Tootfinder

Origin of circular and triangular pores in electron-irradiated hexagonal boron nitride
Umair Javed, Manuel Langle, Vladimir Zobac, Alexander Markevich, Clara Kofler, Martin Paul, Clemens Mangler, Toma Susi, Jani Kotakoski
https://arxiv.org/abs/2507.13180

Origin of circular and triangular pores in electron-irradiated hexagonal boron nitride
For nearly two decades, it has been known that electron irradiation of hexagonal boron nitride (hBN) in a transmission electron microscope leads to the formation of triangular pores. This has been attributed to the lower displacement threshold energy of boron, with or without the assistance of an inelastic scattering event, typically assuming that chemical etching caused by residual gases can be neglected. In this study, in contrast to previous high-vacuum experiments, we show that electron irr…

Electronic nematic normal and superconducting state in electron-doped copper-oxide superconductors
J. Y. Shen, G. F. Chen, Y. C. Zhang, G. Y. Xi, J. Y. He, X. B. Cheng, J. Wu
https://arxiv.org/abs/2506.14077

Electronic nematic normal and superconducting state in electron-doped copper-oxide superconductors
The similarities and differences between hole- and electron-doped cuprates are central to studies of high-temperature superconductivity. While electronic nematicity is found to be pervasive in hole-doped cuprates, iron-based superconductors, and other unconventional superconductors, evidence for electronic nematicity in electron-doped cuprates remains elusive. Here, we discover that the normal state of electron-doped Sr0.9La0.1CuO2 (SLCO) is nematic by the angle-resolved resistivity (ARR) metho…

Studying Maximal Entanglement and Bell Nonlocality at an Electron-Ion Collider
Wei Qi, Zijing Guo, Bo-Wen Xiao
https://arxiv.org/abs/2506.12889 https://

Studying Maximal Entanglement and Bell Nonlocality at an Electron-Ion Collider
In this paper, we propose to test quantum entanglement and Bell nonlocality at an Electron-Ion Collider (EIC). By computing the spin correlations in quark-antiquark pairs produced via photon-gluon fusion, we find that longitudinally polarized photons produce maximal entanglement at leading order, while transversely polarized photons generate significant entanglement near the threshold and in the ultra-relativistic regime. Compared to hadron colliders, the EIC provides a cleaner experimental env…

Modeling of Ionization and Recombination Processes in Plasma with Arbitrary Non-Maxwellian Electron Distributions
Chengcai Shen, Xiaocan Li, Yuan-Kuen Ko, John C. Raymond, Fan Guo, Vanessa Polito, Viviane Pierrard
https://arxiv.org/abs/2506.14668

Modeling of Ionization and Recombination Processes in Plasma with Arbitrary Non-Maxwellian Electron Distributions
In astronomical environments, the high-temperature emission of plasma mainly depends on ion charge states, which requires accurate analysis of the ionization and recombination processes. For various phenomena involving energetic particles, the non-Maxwellian distributions of electrons exhibiting high-energy tails can significantly enhance the ionization process. Therefore, accurately computing ionization and recombination rates with non-Maxwellian electron distributions is essential for emissio…

A Two-stage Optimization Method for Wide-range Single-electron Quantum Magnetic Sensing
Shiqian Guo, Jianqing Liu, Thinh Le, Huaiyu Dai
https://arxiv.org/abs/2506.13469

A Two-stage Optimization Method for Wide-range Single-electron Quantum Magnetic Sensing
Quantum magnetic sensing based on spin systems has emerged as a new paradigm for detecting ultra-weak magnetic fields with unprecedented sensitivity, revitalizing applications in navigation, geo-localization, biology, and beyond. At the heart of quantum magnetic sensing, from the protocol perspective, lies the design of optimal sensing parameters to manifest and then estimate the underlying signals of interest (SoI). Existing studies on this front mainly rely on adaptive algorithms based on bla…

Statistical analysis of electron-induced switching of a spin-crossover complex
Jonas Fu{\ss}angel, Bj\"orn Sothmann, Sven Johannsen, Sascha Ossinger, Felix Tuczek, Richard Berndt, J\"urgen K\"onig, Manuel Gruber
https://arxiv.org/abs/2506.13373

Statistical analysis of electron-induced switching of a spin-crossover complex
Spin-crossover complexes exhibit two stable configurations with distinct spin states. The investigation of these molecules using low-temperature scanning tunneling microscopy has opened new perspectives for understanding the associated switching mechanisms at the single-molecule level. While the role of tunneling electrons in driving the spin-state switching has been clearly evidenced, the underlying microscopic mechanism is not completely understood. In this study, we investigate the electron-…

Electron Heating in Hypersonic Flows: A New Thermodynamically Consistent Model
Felipe Martin Rodriguez Fuentes, Bernard Parent
https://arxiv.org/abs/2506.11457

Electron Heating in Hypersonic Flows: A New Thermodynamically Consistent Model
Accurate prediction of electron temperature ($T_{\rm e}$) in hypersonic non-equilibrium flows is critical, yet hampered by inadequate models for electron heating from vibrationally excited nitrogen. Prior models often relied on ad-hoc scaling or flawed applications of detailed balance that failed to ensure the convergence of electron and vibrational temperatures ($T_{\rm v}$) at thermal equilibrium. This paper introduces a novel, thermodynamically consistent electron heating model derived rigor…

Newton optimization for the Multiconfiguration Self Consistent Field method at the basis set limit: closed-shell two-electron systems
Evgueni Dinvay, Rasmus Vikhamar-Sandberg, Luca Frediani
https://arxiv.org/abs/2506.12906

Newton optimization for the Multiconfiguration Self Consistent Field method at the basis set limit: closed-shell two-electron systems
The multiconfiguration self-consistent-field (MCSCF) method is revisited with the specific focus on the two electron systems for simplicity. A wave function is represented as a linear combination of Slater determinants. Both orbitals and coefficients of this configuration interaction expansion are optimized following the variational principle making use of the Newton optimization technique. It reduces the MCSCF problem to solving a particular differential Newton system, which can be discretized…

Mobility Extraction and Analysis of GaN HEMTs for RF Applications Using TCAD and Experimental Data
Tanjim Rahman
https://arxiv.org/abs/2507.11849 https://

Mobility Extraction and Analysis of GaN HEMTs for RF Applications Using TCAD and Experimental Data
This paper presents an analysis of GaN high-electron-mobility transistors (HEMTs) using both TCAD simulation and experimental characterization. The energy band structure was studied using Nextnano simulation software to observe two-dimensional electron gas (2DEG) formation and carrier confinement under equilibrium conditions. Additionally, I-V and C-V data from fabricated research-grade GaN HEMTs were analyzed to extract key electrical parameters. The device demonstrated an ON current of 1.9 mA…

Electron-phonon-dominated charge-density-wave fluctuations in TiSe$_2$ accessed by ultrafast nonequilibrium dynamics
Sotirios Fragkos, Hibiki Orio, Nina Girotto Erhardt, Akib Jabed, Sarath Sasi, Quentin Courtade, Muthu P. T. Masilamani, Maximilian \"Unzelmann, Florian Diekmann, Baptiste Hildebrand, Dominique Descamps, St\'ephane Petit, Fabio Boschini, J\'an Min\'ar, Yann Mairesse, Friedrich Reinert, Kai Rossnagel, Dino Novko, Samuel Beaulieu, Jakub Schusser

Electron-phonon-dominated charge-density-wave fluctuations in TiSe$_2$ accessed by ultrafast nonequilibrium dynamics
1T-TiSe$_2$ exhibits a charge-density-wave (CDW) transition below 200 K, which is believed to be driven by a hybrid exciton-phonon mechanism, making it a versatile platform for investigating the interplay between electronic and lattice degrees of freedom. Although the corresponding band structure modifications below the CDW transition temperature are well established, only a few reports discuss the occurrence of the CDW fluctuating phase and its spectral features well above the transition tempe…

Using krypton-83m to determine the neutrino-mass bias caused by a non-constant electric potential of the KATRIN source
Moritz Machatschek
https://arxiv.org/abs/2506.13829

Using krypton-83m to determine the neutrino-mass bias caused by a non-constant electric potential of the KATRIN source
Precision spectroscopy of the electron spectrum of the tritium $β$ decay near the kinematic endpoint is a direct method to determine the effective electron antineutrino mass. The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to determine this quantity with a sensitivity of better than $0.3\,\mathrm{eV}$ ($90\,\%$~C.L.). An inhomogeneous electric potential in the tritium source of KATRIN leads to a distortion of the $β$ spectrum, which directly impacts the neutrino-mass observable. This …

Significant role of first-principles electron-phonon coupling in the electronic and thermoelectric properties of LiZnAs and ScAgC semiconductors
Vinod Kumar Solet, Sudhir K. Pandey
https://arxiv.org/abs/2506.13675

Significant role of first-principles electron-phonon coupling in the electronic and thermoelectric properties of LiZnAs and ScAgC semiconductors
The half-Heusler (hH) compounds are currently considered promising thermoelectric (TE) materials due to their favorable thermopower and electrical conductivity. Accurate estimates of these properties are therefore highly desirable and require a detailed understanding of the microscopic mechanisms that govern transport. To enable such estimations, we carry out comprehensive first-principles computations of one of the primary factors limiting carrier transport, namely the electron-phonon ($e-ph$)…

Electron Impact Fragmentation Dynamics of Carbonyl Sulfide: A Combined Experimental and Theoretical Study
Soumya Ghosh, Narayan Kundu, Aryya Ghosh, Dhananjay Nandi
https://arxiv.org/abs/2506.12528

Electron Impact Fragmentation Dynamics of Carbonyl Sulfide: A Combined Experimental and Theoretical Study
In this study, we examine the interactions of low- to intermediate-energy electrons (0$-$45 eV) with carbonyl sulfide (OCS). These collisions lead to the formation of several anionic fragments, including C$^-$, O$^-$, S$^-$, and SO$^-$. When the incident electron energy is below the first ionization potential of the molecule, dissociative electron attachment (DEA) process dominates, primarily yielding O$^-$ and S$^-$ fragments. At higher energies, beyond the ionization potential, ion-pair disso…

Electron polarization induced by electroweak interaction in high-energy scattering off light nuclei
Minh Truong Vo, Vu Dong Tran, Quang Hung Nguyen
https://arxiv.org/abs/2507.10633

Electron polarization induced by electroweak interaction in high-energy scattering off light nuclei
Electron polarization plays a significant role in studies on nuclear scattering. Nevertheless, the development of a comprehensive approach to such a problem remains challenging, particularly at the relativistic electron-energy scale. Herein, we present a theoretical approach to investigate the impact of electron polarization in scattering off unoriented light nuclei, based on the multipole expansion for the scattering cross section at high energies. Numerical calculations for stable $^{6,7}$Li …

Replaced article(s) found for physics.space-ph. https://arxiv.org/list/physics.space-ph/new
[1/1]:
- A Multi-Spacecraft Analysis of Type III Radio Burst Electron Beam Deceleration and electron decel...
Francesco Azzollini, Eduard P. Kontar

Approximating Hamiltonian for Hartree-Fock solutions for nonrelativistic atoms
N. Q. San, O. D. Skoromnik, V. V. Triguk, I. D. Feranchuk
https://arxiv.org/abs/2506.14661

Approximating Hamiltonian for Hartree-Fock solutions for nonrelativistic atoms
In our work we construct a Hamiltonian, whose eigenstates approximate the solutions of the self-consistent Hartree-Fock equations for nonrelativistic atoms and ions. Its eigenvalues are given by completely algebraic expressions and the eigenfunctions are defined by Coulomb wave-functions orbitals. Within this approximation we compute the binding energy, ionization potentials, electron density distribution, electron density at the nucleus, and atomic scattering factors of nonrelativistic atoms a…

Matroids are Equitable
Hannaneh Akrami, Roshan Raj, L\'aszl\'o A. V\'egh
https://arxiv.org/abs/2507.12100 https://arxiv.o…

Matroids are Equitable
We show that if the ground set of a matroid can be partitioned into $k\ge 2$ bases, then for any given subset $S$ of the ground set, there is a partition into $k$ bases such that the sizes of the intersections of the bases with $S$ may differ by at most one. This settles the matroid equitability conjecture by Fekete and Szabó (Electron.~J.~Comb.~2011) in the affirmative. We also investigate equitable splittings of two disjoint sets $S_1$ and $S_2$, and show that there is a partition into $k$ b…

Freestanding single-crystal superconducting electron-doped cuprate membrane
Shay Sandik, Bat-Chen Elshalem, Amram Azulay, Mye Waisbort, Amit Kohn, Beena Kalisky, Yoram Dagan
https://arxiv.org/abs/2506.13620

Freestanding single-crystal superconducting electron-doped cuprate membrane
Thin films of cuprate superconductors are easier to control in terms of doping as compared to bulk samples. However, they require specific substrates to facilitate epitaxial growth. These substrates are often incompatible with materials used in electronic applications. Furthermore, it is challenging to separate the substrate's properties from the material of interest. Here, we demonstrate the fabrication of an electron-doped cuprate membrane. We show that the membrane has a coherent crystal str…

In a laboratory setting, humans have accelerated particles — protons, antiprotons, electrons, and positrons — to incredibly high energies: up to the TeV (trillions of electron-volts) scale.

But cosmic rays, also including protons, electrons, and other atomic nuclei, are produced up to far greater energies, at the PeV (quadrillions of electron-volts) scale and beyond.

These very high energy cosmic rays are produced somewhere in our own galaxy:
in natural, astrophysical…

Astronomers close in on the source of the highest energy particles
On Earth, our particle accelerators can reach tera-electron-volt (TeV) energies. Particles from space are thousands of times as energetic.

X-ray Measurements of $^{44}$Ti in Four Supernova Remnants
Tyler E. Hanover, Mark D. Leising
https://arxiv.org/abs/2507.11647 https://

X-ray Measurements of $^{44}$Ti in Four Supernova Remnants
We present the results of a search for scandium K$_α$ X-ray fluorescence resulting from $^{44}$Ti electron capture decay in four young supernova remnants. We analyzed archival XMM-Newton data from Tycho's SNR, Kepler's SNR, Cassiopeia A, and SN 1987A. We fit the X-ray spectra in regions of interest with up to four components, thermal and power-law, as needed to fit the spectrum, and add a gaussian to test for extra Sc emission. While all require the line with modest confidence, none represent …

Perihelion precession of planetary orbits solved from quantum field theory
Mikko Partanen, Jukka Tulkki
https://arxiv.org/abs/2506.14447 https://

Perihelion precession of planetary orbits solved from quantum field theory
We derive the perihelion precession of planetary orbits using quantum field theory extending the Standard Model to include gravity. Modeling the gravitational bound state of an electron via the Dirac equation of unified gravity [Rep. Prog. Phys. 88, 057802 (2025)], and taking the classical planetary state limit, we obtain orbital dynamics exhibiting a precession in agreement with general relativity. This demonstrates that key general relativistic effects in planetary motion can emerge directly …

celegans_2019: Complete C. elegans neurons (2019)
Networks among neurons of both the adult male and adult hermaphrodite worms C. elegans, constructed from electron microscopy series, to include directed edges (chemical) and undirected (gap junction), and spanning including nodes for muscle and non-muscle end organs.
This network has 585 nodes and 1755 edges.
Tags: Biological, Connectome, Weighted

Measured Lepton Magnetic Moments
Gerald Gabrielse, Graziano Venanzoni
https://arxiv.org/abs/2507.11268 https://arxiv.org/pdf/2507.112…

Measured Lepton Magnetic Moments
The electron and muon magnetic moment have played, and continue to play, important roles in testing the fundamental mathematical description of physical reality called the Standard Model of particle physics (SM). The electron magnetic moment is the most precisely measured property of an elementary particle and the most precise SM prediction, setting up the most precise confrontation ever between experiment and theory. It enables the most precise test of quantum field theory, and of the fundamen…

Quasiclassical electron transport in topological Weyl semimetals
Azaz Ahmad
https://arxiv.org/abs/2506.12120 https://arxiv.org/pdf/25…

Quasiclassical electron transport in topological Weyl semimetals
Weyl fermions are powerful yet simple entities that connect geometry, topology, and physics. While their existence as fundamental particles is still uncertain, growing evidence shows they emerge as quasiparticles in special materials called Weyl semimetals (WSMs). These materials possess unique electronic properties and hold promise for future technologies. This thesis investigates how electrons behave in WSMs, focusing on the chiral anomaly (CA). The CA remains central in condensed matter phys…

A measurement of Galactic synchrotron emission using MWA drift scan observations
Suman Chatterjee, Shouvik Sarkar, Samir Choudhuri, Khandakar Md Asif Elahi, Somnath Bharadwaj, Shiv Sethi, Akash Kumar Patwa
https://arxiv.org/abs/2506.14310

A measurement of Galactic synchrotron emission using MWA drift scan observations
Studying the diffuse Galactic synchrotron emission (hereafter, DGSE) at arc-minute angular scale is important to remove the foregrounds for the cosmological 21-cm observations. Statistical measurements of the large-scale DGSE can also be used to constrain the magnetic field and the cosmic ray electron density of our Galaxy's interstellar medium (ISM). Here, we have used the Murchison Widefield Array (MWA) drift scan observations at $154.2 \, {\rm MHz}$ to measure the angular power spectrum $({\…

Silicon Nitride Microresonator Raman Lasers
Yi Zheng, Haoyang Tan, Andreas Jacobsen, Yang Liu, Chaochao Ye, Yanjing Zhao, Cheng Xiang, Kresten Yvind, Minhao Pu
https://arxiv.org/abs/2506.12658

Silicon Nitride Microresonator Raman Lasers
Silicon nitride (SiN) has emerged as a promising platform for integrated nonlinear photonics because of its low propagation loss, wide transparency window, and CMOS compatibility. Nonlinear processes arising from photon-electron interactions, such as Kerr frequency comb generation and second harmonic generation, have been extensively explored. In contrast, photon-phonon interaction-based nonlinearities, such as stimulated Raman scattering, remain largely unexplored in this integrated platform, …

Convergent close-coupling approach to ion collisions with multi-electron targets: Application to $\bar{p} {\rm C}$ collisions
N. W. Antonio, A. S. Kadyrov
https://arxiv.org/abs/2507.12035

Electron and phonon topology in transition metal material TaSi
Saurabh Kumar Sen, Shivendra Kumar Gupta, Nagarjuna Patra, Ajit Singh Jhala, Poorva Singh
https://arxiv.org/abs/2507.11705

Electron and phonon topology in transition metal material TaSi
The plethora of multifold quasiparticles in topological materials has led to significant advancements in condensed matter physics, inspiring the investigation for materials that host both electronic and bosonic multifold excitations. In this work, we explore the electronic and phononic properties of TaSi, a non symmorphic chiral topological material crystallizing in space group P 2 1 3 (No. 198). This system exhibits multifold fermions, which are higher spin generalizations of Weyl fermions, pr…

Defect-Mediated Pairing and Dissociation of Strongly Correlated Electrons in Low Dimensional Lattices: The Quantum Taxi Effect
Vincent Pouthier, Saad Yalouz
https://arxiv.org/abs/2506.12487

Defect-Mediated Pairing and Dissociation of Strongly Correlated Electrons in Low Dimensional Lattices: The Quantum Taxi Effect
We study the quantum dynamics of a strongly correlated electron pair in a one-dimensional lattice, focusing on the occurrence of local dissociation/pairing mechanisms induced by a site energy defect. To this end, we simulate the time evolution of two interacting electrons on a finite-size chain governed by an extended Hubbard Hamiltonian including on-site Coulomb repulsion $ U $ and nearest-neighbor interaction $V$, along with single-electron hopping $J$. By introducing a local site energy defe…

Magneto-photoelectrochemical 2D heterojunction platform for biosensing detection
Tao Wang, Nan Zhang, Hongjie Huang, Yunhe An, Yunyun Dai, Yongrui Li, Nan Yang, Chaojie Yang, Xinran Zhou, Yucheng Zhu, Yingshan Ma, Lingling Huang, Yongtian Wang, Yang Liu, Zhiyong Yan
https://arxiv.org/abs/2507.11843…

Magneto-photoelectrochemical 2D heterojunction platform for biosensing detection
Photoelectrochemical (PEC) biosensors exhibit significant potential for biomolecule detection due to their high sensitivity and low background noise. However, their performance is severely constrained by the rapid recombination of photogenerated charge carriers. This study innovatively introduces a non-contact magnetic modulation strategy to suppress electron-hole recombination by manipulating carrier spin states, thereby significantly enhancing photoelectric conversion efficiency. Building on …

Joint Denoising of Cryo-EM Projection Images using Polar Transformers
Joakim And\'en, Justus Sagem\"uller
https://arxiv.org/abs/2506.11283 https:/…

Joint Denoising of Cryo-EM Projection Images using Polar Transformers
Deep neural networks~(DNNs) have proven powerful for denoising, but they are ultimately of limited use in high-noise settings, such as for cryogenic electron microscopy~(cryo-EM) projection images. In this setting, however, datasets contain a large number of projections of the same molecule, each taken from a different viewing direction. This redundancy of information is useful in traditional denoising techniques known as class averaging methods, where images are clustered, aligned, and then av…

A remarkable dynamical symmetry of the Landau problem
Tekin Dereli, Philippe Nounahon, Todor Popov
https://arxiv.org/abs/2506.11642 https://

A remarkable dynamical symmetry of the Landau problem
We show that the dynamical group of an electron in a constant magnetic field is the group of symplectomorphisms $Sp(4,\mathbb{R})$. It is generated by the spinorial realization of the conformal algebra $\mathfrak{so}(2,3)$ considered in Dirac's seminal paper "A Remarkable Representation of the 3 + 2 de Sitter Group". The symplectic group $Sp(4,\mathbb{R})$ is the double covering of the conformal group $SO(2,3)$ of 2+1 dimensional Minkowski spacetime which is in turn the dynamical group of a hyd…

Species-Dependent Electron Emission from Nanoparticles under Gamma Irradiation
Darukesha B H M
https://arxiv.org/abs/2507.11317 https://

Species-Dependent Electron Emission from Nanoparticles under Gamma Irradiation
In this study, various nanoparticle species-including Au and Gd$_2$O$_3$-were irradiated with low-energy gamma rays, such as 59.5 keV photons from $^{241}$Am. Pulse-height spectra were recorded using a liquid-scintillation counting system before and after dispersing the nanoparticles into the scintillator, and the differences between them were analyzed to infer the interaction outcomes. Gd$_2$O$_3$ nanoparticles emitted numerous electrons; however, under identical experimental conditions, no de…

A radiative lepton model in a non-invertible fusion rule
Jingqian Chen, Chao-Qiang Geng, Hiroshi Okada, Jia-Jun Wu
https://arxiv.org/abs/2507.11951 https:/…

A radiative lepton model in a non-invertible fusion rule
We propose a new mechanism in which electron and muon masses are induced at one-loop level after dynamically violating the symmetry of the Ising fusion rule. In the neutrino sector, while the neutrino mass is generated at one-loop level, the Ising fusion rule plays a role in stabilizing the particles inside the loop. As a result, the symmetry works like a $Z_2$ symmetry that is not broken at any loop order. Subsequently, we discuss the lepton flavor violating processes, muon anomalous magnetic …

Observation of a Knotted Electron Diffusion Region in Earth's Magnetotail Reconnection
Xinmin Li, Chuanfei Dong, Hantao Ji, Chi Zhang, Liang Wang, Barbara Giles, Hongyang Zhou, Rui Chen, Yi Qi
https://arxiv.org/abs/2507.10842

Observation of a Knotted Electron Diffusion Region in Earth's Magnetotail Reconnection
Magnetic reconnection is a fundamental plasma process that alters the magnetic field topology and releases magnetic energy. Most numerical simulations and spacecraft observations assume a two-dimensional diffusion region, with the electron diffusion region (EDR) embedded in the same plane as the ion diffusion region (IDR) and a uniform guide field throughout. Using observations from Magnetospheric Multiscale (MMS) mission, we report a non-coplanar, knotted EDR in Earth's magnetotail current she…

Hetero-Orbital Two-Component Fractional Quantum Hall States in Bilayer Graphene
Ke Huang, Ajit C. Balram, Hailong Fu, Chengqi Guo, Kenji Watanabe, Takashi Taniguchi, Jainendra K. Jain, Jun Zhu
https://arxiv.org/abs/2506.14188

Hetero-Orbital Two-Component Fractional Quantum Hall States in Bilayer Graphene
A two-dimensional electron system exposed to a strong magnetic field produces a plethora of strongly interacting fractional quantum Hall (FQH) states, the complex topological orders of which are revealed through exotic emergent particles, such as composite fermions, fractionally charged Abelian and non-Abelian anyons. Much insight has been gained by the study of multi-component FQH states, where spin and pseudospin indices of the electron contribute additional correlation. Traditional multi-com…

Replaced article(s) found for astro-ph.HE. https://arxiv.org/list/astro-ph.HE/new
[1/1]:
- SLAMS-Propelled Electron Acceleration at High-Mach Number Astrophysical Shocks
Vladimir Zekovi\'c, Anatoly Spitkovsky, Zachary Hemler

Resolving Phonons in Superconductor Bi2Sr2CaCu2O8 {\delta} at Sub-Unit-Cell Resolution
Xiaowen Zhang, Jiade Li, Xiaoyue Gao, Ruochen Shi, Bo Han, Xiaomei Li, Jinlong Du, Jinsheng Wen, Genda Gu, Shichong Wang, Wentao Zhang, Peng Gao
https://arxiv.org/abs/2506.14127

Resolving Phonons in Superconductor Bi2Sr2CaCu2O8+δ at Sub-Unit-Cell Resolution
The role of phonons in cuprates remains controversial, with their complex lattice structure complicating the investigation. Here, we identify phonon modes originating from charge reservoir and superconducting layers of Bi2Sr2CaCu2O8+δ using sub-unit-cell resolved electron energy loss spectroscopy in a scanning transmission electron microscope. We reveal several phonon modes exhibiting layer-specific localization: ~78 meV in-plane modes localized in the CuO2 planes, ~42 meV hybrid (in-plane and…

Atomic-scale insights on grain boundary segregation in a cathode battery material
Inger-Emma Nylund, Elise R. Eilertsen, Constantinos A. Hatzoglou, Kaja Eggen Aune, Ruben Bj{\o}rge, Antonius T. J. van Helvoort, Ann Mari Svensson, Paraskevas Kontis
https://arxiv.org/abs/2506.13940

Atomic-scale insights on grain boundary segregation in a cathode battery material
The grain boundary segregation of the Co-free pristine spinel LiNi0.5Mn1.5O4 cathode material has been studied by transmission electron microscopy and atom probe tomography. The segregation of Mn and the depletion of Ni at grain boundaries was observed by electron energy loss spectroscopy. These observations were also confirmed by atom probe tomography at other grain boundaries, which also revealed segregation of O and depletion of Li at grain boundaries. In addition, both methods revealed the …

Multi-angle precession electron diffraction (MAPED): a versatile approach to 4D-STEM precession
Stephanie M. Ribet, Rohan Dhall, Colin Ophus, Karen C. Bustillo
https://arxiv.org/abs/2506.11327

Multi-angle precession electron diffraction (MAPED): a versatile approach to 4D-STEM precession
Precession of a converged beam during acquisition of a 4D-STEM dataset improves strain, orientation, and phase mapping accuracy by averaging over continuous angles of illumination. Precession experiments usually rely on integrated systems, where automatic alignments lead to fast, high-quality results. The dependence of these experiments on specific hardware and software is evident even when switching to non-integrated detectors on a precession tool, as experimental set-up becomes challenging an…

Modeling the Role of Secondary Electron Emission in Direct Current Magnetron Sputtering using Explicit Energy-Conserving Particle-in-Cell Methods
Daniel Main, Thomas G. Jenkins, Joseph G. Theis, Gregory R. Werner, John R. Cary, Eve Lanham, Seth A. Veitzer, Scott E. Kruger
https://arxiv.org/abs/2507.10727

Modeling the Role of Secondary Electron Emission in Direct Current Magnetron Sputtering using Explicit Energy-Conserving Particle-in-Cell Methods
We present results from a fully kinetic particle-in-cell (PIC) simulation of direct current magnetron sputtering (dcMS) in a 2D cylindrically symmetric geometry. The particle-in-cell model assumes an electrostatic approximation and includes the Monte Carlo collision (MCC) method to model collisions between electrons and the neutral gas. A newly-implemented explicit energy-conserving PIC algorithm (EC-PIC) is also exercised by the model and results are compared with the standard momentum conserv…

Macroscopicity of quantum superposition
Xiao-Fu Peng
https://arxiv.org/abs/2506.14458 https://arxiv.org/pdf/2506.14458

Macroscopicity of quantum superposition
In this paper, we define a universal measure of macroscopicity $β$ in the form of, ({\em experimentally observed coherence time})/({\em characteristic time required to repeatably distinguish the components of a quantum superposition state}), to divide the quantum/classical (Q-C) boundary. The analysis shows that, for a matter-wave interferometer, covering systems from electron to macromolecular, the measure of its macroscopicity is expressed by $β=pθd/8\hbar$, and it consistently yields $β<…

Observation and Interpretation of Field Emission Saturation Induced by an Ultra-fast Intense Terahertz Field
Wentao Yu, Nongchao Tan, Kai Peng, Kai Jiang, Zhao Yun, Sijie Fan, Longding Wang, Yixiao Fu, Renkai Li, Yingchao Du, Lixin Yan, Chuanxiang Tang, Wenhui Huang
https://arxiv.org/abs/2507.11811…

Observation and Interpretation of Field Emission Saturation Induced by an Ultra-fast Intense Terahertz Field
Field emission under ultra-fast intense terahertz fields provides a promising approach for generating electron bunches with ultrashort pulse duration and high charge densities. It is generally believed that the field emission current described by traditional field emission theory increases dramatically with the applied electric field. However, we conducted extensive field emission experiments using quasi-single-cycle strong-field terahertz radiation at various energy levels and different temper…

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About explosive delayed desorption from methane-doped argon matrices
M. A. Bludov, I. V. Khyzhniy, S. A. Uyutnov, E. V. Savchenko
https://arxiv.org/abs/2506.14726

About explosive delayed desorption from methane-doped argon matrices
The features of delayed desorption from CH4-doped Ar matrices irradiated with an electron beam of subthreshold energy were studied. Radiolysis products were detected by emission spectroscopy. The total desorption yield was monitored by recording the pressure in the experimental chamber. Based on the analysis of the concentration dependence of delayed desorption bursts and their structure, an assumption was made about the formation of CH4 clusters in Ar matrices. At a high dopant concentration o…

Hunting for Dark Photon-Photon Tridents
Thong T. Q. Nguyen
https://arxiv.org/abs/2506.12153 https://arxiv.org/pdf/2506.12153

Hunting for Dark Photon-Photon Tridents
Dark photons, hypothesized to be sufficiently light and/or weakly interacting, offer a compelling candidate for dark matter. Their decay into three photons, referred to as the "dark photon trident" process, becomes the dominant channel when the dark photon mass lies below the electron pair production threshold. This decay channel produces a significant flux of x-rays, presenting an opportunity for indirect detection. In this study, we analyze 16 years of x-ray data from INTEGRAL/SPI to investig…

Significant electron-magnon scattering in layered ferromagnet Cr$_2$Te$_3$
Yujun Wang, Shunzhen Wang, Masashi Kawaguchi, Jun Uzuhashi, Akhilesh Kumar Patel, Kenji Nawa, Yuya Sakuraba, Tadakatsu Ohkubo, Hiroshi Kohno, Masamitsu Hayashi
https://arxiv.org/abs/2507.11182

Significant electron-magnon scattering in layered ferromagnet Cr$_2$Te$_3$
A layered ferromagnet Cr$_2$Te$_3$ is attracting growing interest because of its unique electronic and magnetic properties. Studies have shown that it exhibits sizable anomalous Hall effect (AHE) that changes sign with temperature. The origin of the AHE and the sign change, however, remains elusive. Here we show experimentally that electron-magnon scattering significantly contributes to the AHE in Cr$_2$Te$_3$ through magnon induced skew scattering, and that the sign change is caused by the com…

Spin-Orbit Structure and Helicity Anomaly in Relativistic Electron Vortex Beams
Zhongze Guo, Bei Xu, Qiang Gu
https://arxiv.org/abs/2507.08493 https://

Spin-Orbit Structure and Helicity Anomaly in Relativistic Electron Vortex Beams
The relativistic electron vortex beam (REVB) has attracted increasing attention due to its nontrivial spin-orbit structure recently. As relativistic electrons are governed by the Dirac equation, exact solutions to this equation provide the most reliable starting point for understanding angular momentum characteristics of REVBs. In this work, a set of exact eigensolutions of the Dirac equation are derived in a complex cylindrical coordinate system using a generalized series expansion method. We …

Precision spectral measurements of Chromium and Titanium from 10 to 250 GeV$/n$ and sub-Iron to Iron ratio with the Calorimetric Electron Telescope on the ISS
O. Adriani, Y. Akaike, K. Asano, Y. Asaoka, E. Berti, P. Betti, G. Bigongiari, W. R. Binns, M. Bongi, P. Brogi, A. Bruno, N. Cannady, G. Castellini, C. Checchia, M. L. Cherry, G. Collazuol, G. A. de Nolfo, K. Ebisawa, A. W. Ficklin, H. Fuke, S. Gonzi, T. G. Guzik, T. Hams, K. Hibino, M. Ichimura, M. H. Israel, K. Kasahara, J. Kat…

Precision spectral measurements of Chromium and Titanium from 10 to 250 GeV$/n$ and sub-Iron to Iron ratio with the Calorimetric Electron Telescope on the ISS
The Calorimetric Electron Telescope (CALET), in operation on the International Space Station since 2015, collected a large sample of cosmic-ray (CR) iron and sub-iron events over a wide energy interval. In this paper we report an update of our previous measurement of the iron flux and we present - for the first time - a high statistics measurement of the spectra of two sub-iron elements Cr and Ti in the energy interval from 10 to 250 GeV/n. The analyses are based on 8 years of data. Differently…

Plasma instability in the front of ejected energetic electrons and Type III solar radiobursts
Vladimir Krasnoselskikh, Immanuel Christopher Jebaraj, Tom Robert Franck Cooper, Andrii Voschepynets, Thierry Dudok de Wit, Marc Pulupa, Forrest Mozer, Oleksiy Agapitov, Michael Balikhin, Stuart D. Bale
https://arxiv.org/abs/2507.08437

Plasma instability in the front of ejected energetic electrons and Type III solar radiobursts
Type III radio bursts are a signature of the flux of near-relativistic electrons ejected during solar flares. These bursts are frequently observed by spacecraft such as the Parker Solar Probe. It is traditionally believed that these electron beams generate Langmuir waves through the two-stream instability, which are then converted into electromagnetic waves. In this study, we revise that model by examining how the electron distribution becomes truncated due to the "time-of-flight" effect as the…

Replaced article(s) found for physics.plasm-ph. https://arxiv.org/list/physics.plasm-ph/new
[1/1]:
- SLAMS-Propelled Electron Acceleration at High-Mach Number Astrophysical Shocks
Vladimir Zekovi\'c, Anatoly Spitkovsky, Zachary Hemler

Enantioselective radical reactions can be induced by electron spin polarization: A quantum mechanism for Nature's emergent homochirality?
Thomas P Fay
https://arxiv.org/abs/2507.08287

Enantioselective radical reactions can be induced by electron spin polarization: A quantum mechanism for Nature's emergent homochirality?
Biomolecules that constitute life on Earth are chiral, but the precise mechanism by which homochirality emerged remains a mystery. In this work it is demonstrated that reactions of radical pairs, where one of the radical electron spins is polarised, can be enantioselective. This phenomenon arises from transient coherent quantum dynamics of the radical pair electron spins, which is known to occur even in warm and noisy condensed phase environments, where energetic perturbations much smaller than…

Quantum oscillations reveal sixfold fermions in cubic $\beta$-PtBi$_2$
E. F. Bavaro, J. Castro, V. Vildosola, J. I. Facio, V. F. Correa
https://arxiv.org/abs/2507.11791

Quantum oscillations reveal sixfold fermions in cubic $β$-PtBi$_2$
We report a study of de Haas-van Alphen oscillations in high-quality single crystals of cubic $β$-PtBi$_2$. In combination with density functional theory calculations, we identify quantum oscillations associated with all Fermi surface sheets predicted by theory. Our results uncover three small electron pockets centered on a sixfold band-touching point located approximately 25 meV below the Fermi level at the $R$ point of the Brillouin zone. These findings firmly establish the presence of sixfo…

QED-IR as Topological Quantum Theory of Dressed States
J. Gamboa, F. Mendez
https://arxiv.org/abs/2507.11668 https://arxiv.org/pdf/25…

QED-IR as Topological Quantum Theory of Dressed States
We investigate quantum electrodynamics in the infrared regime (QED-IR) using the adiabatic approximation and the framework of the functional Berry phase. In this approach, the physical state space is exact, nonperturbatively dressed, and endowed with a topological structure. Electrons do not exist as bare particles, but as topologically protected electron-photon clouds, defining a new kind of infrared quantum. These clouds are weakly bound in energy -- with a binding scale estimated at \( Λ_{\…

Slip electron flow in GaAs microscale constrictions
Daniil I. Sarypov, Dmitriy A. Pokhabov, Arthur G. Pogosov, Evgeny Yu. Zhdanov, Andrey A. Shevyrin, Alexander A. Shklyaev, Askhat K. Bakarov
https://arxiv.org/abs/2506.10276

Slip electron flow in GaAs microscale constrictions
Hydrodynamic electron transport in solids, governed by momentum-conserving electron-electron collisions, offers a unique framework to explore collective phenomena. Within this framework, correlated electron motion is modeled as viscous fluid flow, with viscosity serving as the interaction parameter. Advances in electron hydrodynamics remain constrained by two unresolved issues: the questionable existence of perfect boundary slip$\unicode{x2013}$a hallmark of frictionless transport$\unicode{x201…

This https://arxiv.org/abs/2409.00532 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Bounds on $T_c$ in the Eliashberg theory of Superconductivity. II: Dispersive phonons
The standard Eliashberg theory of superconductivity is studied, in which the effective electron-electron interactions are mediated by generally dispersive phonons, with Eliashberg spectral function $α^2 F(ω)\geq 0$ that is $\proptoω^2$ for small $ω>0$ and vanishes for large $ω$. The Eliashberg function also defines the electron-phonon coupling strength $λ:= 2 \int_0^\infty\frac{α^2 F(ω)}ωdω$. Setting $\frac{2α^2 F(ω)}ωdω=: λP(dω)$, formally defining a probability measure $P(dω)…

fly_larva: Drosophila larva brain (2023)
A complete synaptic map of the brain connectome of the larva of the fruit fly Drosophila melanogaster. Nodes are neurons, and edges are synaptic connections, traced individually from brain image sections using three-dimensional electron microscopy–based reconstruction. Node metadata include the neuron hempisphere, hemispherical homologue, cell type, annotations, and inferred cluster. Edge metadata include the type of interaction (`'aa'`,…

The Darkfield Approach to Measuring Vacuum Birefringence and Light-by-Light Couplings -- A Proof-of-Principle Experiment
Michal Sm\'id, Pooyan Khademi, Carsten B\"ahtz, Erik Brambrink, Jindrich Chalupsky, Tom E. Cowan, Samuele Di Dio Cafiso, Sebastian G\"ode, J\"org Grenzer, Vera Hajkova, Peter Hilz, Willi Hippler, Hauke H\"opner, Alzbeta Horynova, Oliver Humphries, Simon Jelinek, Libor Juha, Felix Karbstein, Alejandro Laso-Garcia, Robert L\"otzsch, Aim\…

The Darkfield Approach to Measuring Vacuum Birefringence and Light-by-Light Couplings -- A Proof-of-Principle Experiment
Vacuum fluctuations give rise to effective nonlinear interactions between electromagnetic fields. These generically modify the characteristics of light traversing a strong-field region. X-ray free-electron lasers constitute a particularly promising probe, due to their brilliance, the possibility of precise control and favourable frequency scaling. However, the nonlinear vacuum response is very small even when probing a tightly focused high-intensity laser field with XFEL radiation and direct me…

Numerical investigations of heavy ion driven plasma wakefield acceleration
Jiangdong Li, Jiancheng Yang, Guoxing Xia, Jie Liu, Wenlong Zhan, Ruihu Zhu
https://arxiv.org/abs/2506.14132

Numerical investigations of heavy ion driven plasma wakefield acceleration
Plasma-Based Acceleration (PBA) has emerged as a promising approach to achieve ultra-high gradient particle acceleration. While extensive PBA studies have been conducted using laser, electron, and proton drivers, significant challenges remain in achieving high efficiency, stable acceleration, and scalable energy gain. Meanwhile, due to their higher beam charge density, heavier particle mass and higher kinetic energy, heavy-ion beam drivers represent an interesting direction in PBA research. In …

Structure determination of flat honeycomb Bi grown on Ag(111)
Ziyong Zhang, Xiaobin Chen, Takeshi Nakagawa
https://arxiv.org/abs/2507.12788 https://…

Structure determination of flat honeycomb Bi grown on Ag(111)
Honeycomb bismuthene structures on Ag(111) were investigated using low-energy electron diffraction (LEED) and density functional theory. LEED I(V) analysis revealed that 0.5 monolayer (ML) of Bi forms an ultraflat honeycomb lattice with negligible buckling at ~120 K, which transforms into other structures upon warming to room temperature. A similar flat bismuthene structure also forms in Mn/Bi/Ag(111), which remains stable even at room temperature. Mn deposition on $(p\times \sqrt{3})$-rect Bi/…

Study of the beyond standard model interaction using Coherent Elastic Neutrino-Nucleus Scattering process
S. P. Behera, S. Panda, D. K. Mishra
https://arxiv.org/abs/2506.14443

Study of the beyond standard model interaction using Coherent Elastic Neutrino-Nucleus Scattering process
Phenomenological studies are carried out to find the potential reach of a detector to constraints on possible beyond the standard model general neutrino interactions in the neutrino-quark sector, for the proposed Indian Coherent Neutrino-nucleus Scattering Experiment (ICNSE) at the Bhabha Atomic Research Centre in India. Reactors of different core configuration and power are used as sources of electron antineutrinos. The study has been carried out considering a target mass of 10 kg and an expos…

Multichannel topological Kondo models and their low-temperature conductances
Guangjie Li, Elio J. K\"onig, Jukka I. V\"ayrynen
https://arxiv.org/abs/2507.11682

Multichannel topological Kondo models and their low-temperature conductances
In the multichannel Kondo effect, overscreening of a magnetic impurity by conduction electrons leads to a frustrated exotic ground state. It has been proposed that multichannel topological Kondo (MCTK) model involving topological Cooper pair boxes with $M$ Majorana modes [SO($M$) "spin"] and $N$ spinless electron channels exhibits an exotic intermediate coupling fixed point. This intermediate fixed point has been analyzed through large-$N$ perturbative calculations, which gives a zero-temperatu…

Noncentrosymmetric High-Temperature Superconductivity in doped $d^9$ Multiferroics
Hu Zhang
https://arxiv.org/abs/2506.14314 https://…

Noncentrosymmetric High-Temperature Superconductivity in doped $d^9$ Multiferroics
Multiferroics with $d^9$ electronic configurations, such as $SnCuO_2$, $PbCuO_2$, and $BiNiO_2$, exhibit coexisting antiferromagnetic order and ferroelectricity. Motivated by the fundamental link between symmetry breaking, strong electron correlations, and unconventional superconductivity, we propose a materials design strategy targeting noncentrosymmetric high-temperature superconductors through chemical doping of engineered $d^9$ multiferroics. This approach bridges two phenomena: (i) the coe…

Overtone Rabi oscillation of optically polarized triplet electron spins and nuclear hyperpolarization in powder
Koichiro Miyanishi, Takuya F. Segawa, Makoto Negoro, Akinori Kagawa, Kazuyuki Takeda
https://arxiv.org/abs/2506.10498

Overtone Rabi oscillation of optically polarized triplet electron spins and nuclear hyperpolarization in powder
We report coherent overtone Rabi oscillations of optically-polarized triplet electron spins and nuclear hyperpolarization in powder samples at room temperature. The strong orientation dependence through the zero-field splitting (ZFS) interaction in the single-quantum transition is overcome by coherently driving the significantly narrower overtone transition. Analytical formulas for the overtone lineshape and nutation functions for axially symmetric ZFS interactions are derived. Overtone Rabi os…

Speed-dependent Threshold for Electron Injection into Diffusive Shock Acceleration
Siddhartha Gupta, Damiano Caprioli, Anatoly Spitkovsky
https://arxiv.org/abs/2506.09134

Speed-dependent Threshold for Electron Injection into Diffusive Shock Acceleration
Finding the injection threshold for diffusive shock acceleration (DSA) of electrons in collisionless shocks has been a longstanding unsolved problem. Using first-principles kinetic simulations, we identify the conditions for electron injection into DSA and quantify the evolution of the nonthermal tail in self-generated electromagnetic turbulence. By analyzing electron trajectories and their momentum gain during shock-recrossing cycles, we demonstrate that electrons start participating in DSA wh…

Accelerated free energy estimation in ab initio path integral Monte Carlo simulations
Pontus Svensson, Fotios Kalkavouras, Uwe Hernandez Acosta, Zhandos A. Moldabekov, Panagiotis Tolias, Jan Vorberger, Tobias Dornheim
https://arxiv.org/abs/2507.12960

Accelerated free energy estimation in ab initio path integral Monte Carlo simulations
We present a methodology for accelerating the estimation of the free energy from path integral Monte Carlo simulations by considering an intermediate artificial reference system where interactions are inexpensive to evaluate numerically. Using the spherically averaged Ewald interaction as this intermediate reference system for the uniform electron gas, the interaction contribution for the free energy was evaluated up to 18 times faster than the Ewald-only method. Furthermore, a $ξ$-extrapolati…

Cutting rules for non-relativistic dark matter in solids based on Kohn-Sham orbitals
Zheng-Liang Liang, Fawei Zheng
https://arxiv.org/abs/2507.11033 https:…

Cutting rules for non-relativistic dark matter in solids based on Kohn-Sham orbitals
The Cutkosky cutting rules establish a direct connection between the imaginary parts of loop amplitudes and physical observables such as decay rates and cross sections, providing heuristic insights into the underlying processes. This work lays a robust theoretical foundation for the application of cutting rules in solid-state systems involving instantaneous dark matter (DM)-electron Yukawa interaction as well as the Coulomb potential. The cutting rules are formulated using the single-electron w…

Structural Inhomogeneities and Suppressed Magneto-Structural Coupling in Mn-Substituted GeCo2O4
Shivani Sharma, Pooja Jain, Benny Schundelmier, Chin-Wei Wang, Poonam Yadav, Adrienn Maria Szucs, Kaya Wei, N. P. Lalla, Theo Siegrist
https://arxiv.org/abs/2506.14017

Structural Inhomogeneities and Suppressed Magneto-Structural Coupling in Mn-Substituted GeCo2O4
A comprehensive study of Ge1-xMnxCo2O4 (GMCO) system was conducted using neutron powder diffraction (NPD), x-ray diffraction (XRD), Scanning electron microscopy, magnetometry, and heat capacity measurements. Comparative analysis with GeCo2O4 (GCO) highlights the influence of Mn substitution on the crystal and magnetic structure at low temperature. Surprisingly, phase separation is observed in GMCO with a targeted nominal composition of Ge0.5Mn0.5Co2O4. SEM/EDX analysis reveals that the sample p…

Exciton condensation of composite fermions in double layer quantum Hall systems
Xiang-Jian Hou, Lei Wang, Ying-Hai Wu
https://arxiv.org/abs/2506.12539 http…

Exciton condensation of composite fermions in double layer quantum Hall systems
We study fractional quantum Hall states in double layer systems that can be interpreted as exciton condensates of composite fermions. An electron in one layer is dressed by two fluxes from the same layer and two fluxes from the other layer to become composite fermions that form effective Landau levels. It is found that two types of composite fermion exciton condensates could occur. In the first type ones, all effective levels are partially occupied and excitonic correlations are present between…

Replaced article(s) found for physics.acc-ph. https://arxiv.org/list/physics.acc-ph/new
[1/1]:
Franck-Condon electron emission from polar semiconductor photocathodes

Probing electron spin dynamics in single telecom InAs(P)/InP quantum dots using the Hanle effect
Maja Wasiluk, Helena Janowska, Anna Musia{\l}, Johann P. Reithmaier, Mohamed Benyoucef, Wojciech Rudno-Rudzi\'nski
https://arxiv.org/abs/2507.08785

Probing electron spin dynamics in single telecom InAs(P)/InP quantum dots using the Hanle effect
Spins of carriers confined in quantum dots (QDs) are promising candidates for qubits due to their relatively long spin relaxation times. However, the electron spin dephasing, primarily driven by hyperfine interactions with nuclear spins, can limit their coherence. Here, we report the first Hanle effect demonstration in single InAs(P)/InP QDs emitting in the telecom C-band leading to experimental determination of electron spin dephasing time. Using polarization-resolved photoluminescence spectro…

Photomagnetic-Chiral Anisotropy mediated by Chirality-Driven Asymmetric Spin Splitting
Tianwei Ouyang, Hang Su, Wanning Zhang, Yingying Duan, Yuxi Fang, Shunai Che, Yizhou Liu
https://arxiv.org/abs/2506.13696

Photomagnetic-Chiral Anisotropy mediated by Chirality-Driven Asymmetric Spin Splitting
Photo-magnetic effects (PMEs), intrinsic to transition metals, arises from the interaction between light-induced angu-lar momentum and electronic spin. These effects are suppressed in noble metals with high symmetry and electron density. Introducing chiral structures can induce photomagnetic-chiral anisotropy (PM-ChA) of metals by linking chirality and spin dynamics. However, a theoretical explain remains elusive. Here, we investigated the mechanism of PM-ChA in tetrahelix-stacked chiral nanost…

Self-seeded photon acceleration by electron beam-driven transition radiation
Chaolu Ding, Xuesong Geng, Liangliang Ji
https://arxiv.org/abs/2506.06531 http…

Self-seeded photon acceleration by electron beam-driven transition radiation
Photon acceleration (PA) driven by ultra-relativistic electron beams offers a promising approach to generating high-power, high-frequency coherent radiation sources. While current methods typically rely on external optical laser pulses injected into beam-driven plasma wakefields, they face significant challenges in synchronization and alignment between electron accelerators and laser systems. We propose utilizing transition radiation (TR) generated by the drive electron bunch transversing the v…

Tensor network algorithm to solve polaron impurity problems
Ruofan Chen, Lei Gu, Chu Guo
https://arxiv.org/abs/2507.05580 https://arx…

Tensor network algorithm to solve polaron impurity problems
The polaron problem is a very old problem in condensed matter physics that dates back to the thirties, but still remain largely unsolved today, especially when electron-electron interaction is taken into consideration. The presence of both electron-electron and electron-phonon interactions in the problem invalidates most existing numerical methods, either computationally too expensive or simply intractable. The continuous time quantum Monte Carlo (CTQMC) methods could tackle this problem, but a…

Coexistence of anomalous spin dynamics and weak magnetic order in a chiral trillium lattice K2FeSn(PO4)3
J. Khatua, S. Krishnamoorthi, Changhyun Koo, Gyungbin Ban, Taeyun Kim, Suyoung Kim, Yugo Oshima, Jonas A. Krieger, Thomas J. Hicken, Hubertus Luetkens, Marc Uhlarz, Eundeok Mun, Kyeong Jun Lee, Seo Hyoung Chang, R. Sankar, Kwang-Yong Choi
https://…

Coexistence of anomalous spin dynamics and weak magnetic order in a chiral trillium lattice K2FeSn(PO4)3
Trillium lattices, where magnetic ions form a three-dimensional chiral network of corner-sharing equilateral triangular motifs, offer a prominent platform to explore exotic quantum states. In this work, we report ground-state properties of the $S$ = 5/2 trillium lattice compound K$_{2}$FeSn(PO$_{4}$)$_{3}$ through thermodynamic, electron spin resonance (ESR), and muon spin relaxation ($μ$SR) experiments. Thermodynamic and ESR measurements reveal the two-step evolution of magnetic correlations …

Spin and valley-dependent tunneling in MoS$_2$ through magnetic barrier
Ahmed Jellal, Nadia Benlakhouy, Pablo D\'iaz, David Laroze
https://arxiv.org/abs/2507.10716

Spin and valley-dependent tunneling in MoS$_2$ through magnetic barrier
We study electron transport in monolayer molybdenum disulfide MoS$_2$ subjected to a magnetic barrier. Our analysis employs a full-band continuum model to capture the relevant physical phenomena. We focus on how electron energy, magnetic field strength, and the geometric characteristics of the barrier affect the transmission and conductance. We observe sharp resonant tunneling features emerging from quantum interference effects induced by magnetic confinement. A key outcome of our study is the …

A Spintronic Battery with Reversible Modulation of Spin Polarization through Li Charge/Discharge: A First Principles Computational Modelling Case Study for an Antiperovskite System
Sk Mujaffer Hossain, Vinila Bedekara, Priyanka Yadavb, Ram Janay Chudhary, Satishchandra Ogale
https://arxiv.org/abs/2506.14401

A Spintronic Battery with Reversible Modulation of Spin Polarization through Li Charge/Discharge: A First Principles Computational Modelling Case Study for an Antiperovskite System
A key notion defining the progress of the emergent fields of modern electronics, renewable energy, and smart systems is charge storage, which is primarily embodied in various battery chemistries and systems. In addition to the charge property, the electron also has the spin property, which is exploited in the field of spintronics to access novel magnetically controlled device actions that are not accessible to conventional electronics. An interesting question is whether the two can be fruitfull…

Signature of current-induced nuclear spin polarization in (Bi$_{1-x}$Sb$_{x}$)$_2$Te$_3$
Sofie K\"olling, \.Inan\c{c} Adagideli, Alexander Brinkman
https://arxiv.org/abs/2506.14481

Signature of current-induced nuclear spin polarization in (Bi$_{1-x}$Sb$_{x}$)$_2$Te$_3$
In systems with spin-momentum locking, such as the surface states of three-dimensional topological insulators, a charge current is spin-polarized and spin-flip interactions between electron and nuclear spins can transfer this polarization to the nuclear spin system. When a nonzero bias voltage is applied, the nuclear polarization reaches a steady-state value. This polarization emerges as an effective in-plane magnetic field acting on electrons, called the Overhauser field, which causes an offse…

Universal energy cascade and relaxation in three-dimensional inertial electron magnetohydrodynamic turbulence
Supratik Banerjee, Arijit Halder, Amita Das
https://arxiv.org/abs/2507.07628

Universal energy cascade and relaxation in three-dimensional inertial electron magnetohydrodynamic turbulence
Electron magnetohydrodynamics (EMHD) provides a realistic model for electron-scale heating and acceleration in weakly collisional space plasmas. A divergence-free Banerjee-Galtier type (Banerjee and Galtier, JoPA, 2017) exact relation is derived for three-dimensional homogeneous and not necessarily isotropic EMHD turbulence. By explicit calculation, it has been shown that the energy cascade is not affected by the presence of a uniform background magnetic field Bo. Using direct numerical simulat…

Nanoscale Magnetic Resonance Imaging and Control of a Strongly Interacting Dipolar System
Piotr Put, Nathaniel T. Leitao, Christina Spaegele, Haoyang Gao, Oksana Makarova, Bartholomeus Machielse, Hengyun Zhou, Federico Capasso, Leigh S. Martin, Hongkun Park, Mikhail D. Lukin
https://arxiv.org/abs/2506.11920

Nanoscale Magnetic Resonance Imaging and Control of a Strongly Interacting Dipolar System
Magnetic Resonance Imaging (MRI) is a fundamental tool for physical and life sciences, yet its spatial resolution is typically limited to macroscopic scales. Here, we demonstrate nanoscale MRI by combining strong, time-dependent local magnetic field gradients with coherent control of a dense ensemble of electron spins hosted in atom-like defects in diamond. Using this platform, we generate and manipulate nanoscale spin textures - spatially structured patterns of spin orientation - and track the…

On the origin of the E1 electron trap level in GaN and dilute AlxGa1-xN films
Piotr Kruszewski, Jose Coutinho, Vladimir P. Markevich, Pawel Prystawko, Lijie Sun, Jerzy Plesiewicz, Chris A. Dawe, Matthew P. Halsall, Anthony R. Peaker
https://arxiv.org/abs/2506.10566

On the origin of the E1 electron trap level in GaN and dilute AlxGa1-xN films
The results of high-resolution Laplace deep-level transient spectroscopy (L-DLTS) measurements applied to the E1 and FeGa electron traps in dilute AlxGa1-xN films (x = 0.063), grown by metal-organic vapor phase epitaxy (MOVPE) on Ammono-GaN substrates, are presented. It is shown that the electron emission signals associated with the E1 donor and the FeGa acceptor levels split into individual components due to the aluminium fluctuations in the nearest neighbour shells around the E1 and FeGa defe…

Reconfigurable three dimensional magnetic nanoarchitectures
Sabri Koraltan, Fabrizio Porrati, Robert Kraft, Sven Barth, Markus Weigand, Claas Abert, Dieter Suess, Michael Huth, Sebastian Wintz
https://arxiv.org/abs/2506.14383

Reconfigurable three dimensional magnetic nanoarchitectures
Three-dimensional (3D) nanomagnetism is a rapidly developing field within magnetic materials research, where exploiting the third dimension unlocks opportunities for innovative applications in areas such as sensing, data storage, and neuromorphic computing. Among various fabrication techniques, focused electron beam-induced deposition (FEBID) offers high flexibility in creating complex 3D nanostructures with sub-100 nm resolution. A key challenge in the development of 3D nanomagnets is the abil…

Tracing the Evolution of Nuclear Excitation at the Electron-Ion Collider
Niseem Magdy
https://arxiv.org/abs/2506.07426 https://arxiv.…

Tracing the Evolution of Nuclear Excitation at the Electron-Ion Collider
We investigate the evolution of nuclear excitation in electron-nucleus (e+A) collisions at the upcoming Electron-Ion Collider (EIC) using the BeAGLE event generator. Leveraging the EIC's unique collider kinematics, we demonstrate the remarkable capability to separate distinct nuclear reaction stages, hard scattering, intranuclear cascade, and nuclear de-excitation, in the laboratory frame. Our systematic analysis reveals that event-by-event fluctuations in the mean transverse momentum (k) are h…

Mean Force Emission Theory for Classical Bremsstrahlung in Electron-Ion Plasmas
Julian P. Kinney, Heath J. LeFevre, Carolyn C. Kuranz, Scott D. Baalrud
https://arxiv.org/abs/2506.06177

Mean Force Emission Theory for Classical Bremsstrahlung in Electron-Ion Plasmas
This work extends the previously developed mean force emission theory to describe electron-ion plasmas. Results are compared to molecular dynamics simulations. The main extensions are to account for the attractive nature of electron-ion interactions and to model short-range quantum effects using the Kelbg potential. By reducing the electron-ion force inside the deBroglie wavelength, the Kelbg potential causes a decay at high frequencies and a decrease in magnitude of the low frequency bremsstra…

3D atomic structure determination with ultrashort-pulse MeV electron diffraction
Vincent Hennicke (Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany), Max Hachmann (Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany), Paul Benjamin Klar (Faculty of Geosciences and MAPEX Center for Materials and Processes, University of Bremen, Bremen, Germany), Patrick Y. A. Reinke (Center for Free-Electron Laser Science CFEL, Deutsches Elektronen…

3D atomic structure determination with ultrashort-pulse MeV electron diffraction
Understanding structure at the atomic scale is fundamental for the development of materials with improved properties. Compared to other probes providing atomic resolution, electrons offer the strongest interaction in combination with minimal radiation damage. Here, we report the successful implementation of MeV electron diffraction for ab initio 3D structure determination at atomic resolution. Using ultrashort electron pulses from the REGAE accelerator, we obtained high-quality diffraction data…

Dihadron Angular Correlations in the $e^ e^-$ Collision
Wan-Li Ju, Zhe-Yan Shu, Tong-Zhi Yang, Zhen-Hua Zhang, Hua Xing Zhu
https://arxiv.org/abs/2506.11463

Dihadron Angular Correlations in the $e^+e^-$ Collision
The precision of fixed-order calculations on the dihadron production in electron-positron annihilation is paramount for probing QCD factorization and constraining non-perturbative inputs. This paper investigates the QCD corrections to the angular separation distribution $θ_{12}$ between two observed hadrons, $H_1$ and $H_2$, in the process $e^+e^- \to H_1 H_2 + X$ up to $\mathcal{O}(α_s^2)$, with particular emphasis on the intermediate region $θ_{12} \in (0,π)$. The partonic processes at th…

Non-Perturbative Solutions to the Vlasov-Boltzmann Equation for Weakly Ionized Plasmas
Joel Saucedo, Uday Lamba, Hasitha Mahabaduge
https://arxiv.org/abs/2507.10565

Non-Perturbative Solutions to the Vlasov-Boltzmann Equation for Weakly Ionized Plasmas
The electron energy distribution function (EEDF) in low-temperature plasmas exhibits features not fully captured by classical collisional models, particularly across the transition from kinetic to hydrodynamic regimes. This work attributes these phenomena to a dynamically broken scale invariance within the Vlasov-Boltzmann equation. By applying renormalization group (RG) techniques directly to the kinetic operator, we derive non-perturbative EEDF solutions valid across a range of collisionality…

The role of small-angle electron-electron scattering in transverse magnetic focusing experiment
Dmitry A. Egorov, Dmitriy A. Pokhabov, Evgeny Yu. Zhdanov, Andrey A. Shevyrin, Askhat K. Bakarov, Alexander A. Shklyaev, Arthur G. Pogosov
https://arxiv.org/abs/2506.09432

The role of small-angle electron-electron scattering in transverse magnetic focusing experiment
We demonstrate the crucial role of small-angle scattering in transverse magnetic focusing (TMF) in ballistic GaAs/AlGaAs heterostructures. Measurements in various samples show that the role significantly depends on their geometry. We propose a phenomenological model parameterizing this dependence with the angular acceptance of the detecting contact. This model is consistent with the diversity of experimental data and therefore enables accurate extraction of the key characteristic of inter-elect…

Fast nanothermometry based on direct electron detection of electron backscattering diffraction patterns
Ryan Gnabasik, Razan O. Nughays, Ashlynn Overholser, Vijay Kumar, Shantal Adajian, Nicol\`o Maria della Ventura, Daniel S. Gianola, Bolin Liao
https://arxiv.org/abs/2507.05467

Fast nanothermometry based on direct electron detection of electron backscattering diffraction patterns
Accurate temperature measurement at the nanoscale is crucial for thermal management in next-generation microelectronic devices. Existing optical and scanning-probe thermometry techniques face limitations in spatial resolution, accuracy, or invasiveness. In this work, we demonstrate a fast and non-contact nanothermometry method based on temperature-induced changes in electron backscattering diffraction (EBSD) patterns captured by a high-performance direct electron detector within a scanning elec…

Unlocking time-dependent $CP$ violation without signal vertexing at $B$ factories
Mirco Dorigo, Sebastiano Raiz, Diego Tonelli, Radek Zlebcik
https://arxiv.org/abs/2506.11196

Unlocking time-dependent $CP$ violation without signal vertexing at $B$ factories
We present a novel method to measure, without reconstructing the signal decay vertex, time-dependent $CP$ violation in $B^0$ mesons produced in energy-asymmetric electron-positron collisions near the $Υ(4S)$ resonance. The method relies on quantum-entangled $B^0\overline{B}^0$ pair-production making the decay time of the partner meson sensitive to $CP$ violation of the signal. We derive analytical expressions for the relevant time-evolution and study, as a use case, an application to $B^0\toπ…

Study of the uniform electron gas through parametrized partition functions
Tommaso Morresi, Giovanni Garberoglio, Hongwei Xiong, Yunuo Xiong
https://arxiv.org/abs/2506.10113

Study of the uniform electron gas through parametrized partition functions
We investigate the energy per particle, static structure factor, and momentum distribution of the uniform electron gas for different conditions defined by the dimensionless temperature $Θ= 0.25 - 1.0$ and average interparticle distance $r_s = 0.5 - 80.0$ using path-integral Monte Carlo (PIMC) simulations. For small $r_\text{s}$ ($r_\text{s}\leq10$) where the sign problem is particularly challenging, we employ a recent approach based on an analytic continuation of the partition function using a…

Roadmap for electronic structure, anharmonicity, and electron-phonon calculations in locally disordered inorganic and hybrid halide perovskites
Marios Zacharias, George Volonakis, Laurent Pedesseau, Claudine Katan, Feliciano Giustino, Jacky Even
https://arxiv.org/abs/2506.10402

Roadmap for electronic structure, anharmonicity, and electron-phonon calculations in locally disordered inorganic and hybrid halide perovskites
The role of data in modern materials science becomes more valuable and accurate when effects such as electron-phonon coupling and anharmonicity are included, providing a more realistic representation of finite-temperature material behavior. Furthermore, positional polymorphism, characterized by correlated local atomic disorder usually not reported by standard diffraction techniques, is a critical yet underexplored factor in understanding the electronic structure and transport properties of ener…

Revisiting the Electron EDM in the NMSSM
Kaifei Ning, Michael Ramsey-Musolf
https://arxiv.org/abs/2507.06320 https://arxiv.org/pdf/25…

Revisiting the Electron EDM in the NMSSM
The Next-to-Minimal Supersymmetric Standard Model (NMSSM) with explicit CP violation offers a promising framework for explaining the observed baryon asymmetry while remaining consistent with stringent electric dipole moment (EDM) bounds. In this work, we identify a previously overlooked set of two-loop diagrams that contribute to fermion EDMs in the NMSSM. Our analysis of the electron EDM shows that, for certain NMSSM specific CP-violating phases, these diagrams partially cancel existing contri…

Phonon mode splitting and phonon anomaly in multiband electron systems
Klaus Ziegler
https://arxiv.org/abs/2507.08127 https://arxiv.o…

Phonon mode splitting and phonon anomaly in multiband electron systems
We investigate the topological consequences of coupling chiral fermions to local, dispersionless phonons. This interaction induces a splitting of the phonon spectrum into three bands: a flat band and two bands with linear dispersion, all of which are degenerate at a nodal point located at zero wavevector. The flat band exhibits vanishing Berry curvature, while the linearly dispersing bands carry nontrivial topological features. Their Berry curvature fields assume a hedgehog-like structure in mo…

From stripes to hexagons: strain-induced 2D Pb phases confined between graphene and SiC
Markus Gruschwitz, Sergii Sologub, Chitran Ghosal, Zamin Mamiyev, Yuran Niu, Alexei Zakharov, Christoph Tegenkamp
https://arxiv.org/abs/2506.10791

From stripes to hexagons: strain-induced 2D Pb phases confined between graphene and SiC
The intercalation of metals beneath graphene offers a powerful route to stabilizing and protecting novel two-dimensional (2D) phases. The epitaxial growth of Pb monolayers on SiC(0001), combined with the relatively large spacing of the suspended graphene, makes this system particularly distinctive. Using low-energy electron diffraction (LEED) and various microscopy techniques -- including scanning electron microscopy (SEM), scanning tunneling microscopy (STM), and low-energy electron microscopy…

Electron-phonon couplings in locally disordered materials: The case of hybrid halide perovskites
Marios Zacharias, George Volonakis, Laurent Pedesseau, Claudine Katan, Feliciano Giustino, Jacky Even
https://arxiv.org/abs/2506.09673

Electron-phonon couplings in locally disordered materials: The case of hybrid halide perovskites
Positional polymorphism in solids refers to distributions of correlated locally disordered unit cells which reflect, on average, the high-symmetry structure observed in diffraction experiments. The standard theory of electron-phonon interactions is unable to account for the temperature-dependent electronic structure of polymorphous materials. A prime example of such materials is hybrid halide perovskites, for which calculations of band gaps at finite temperatures do not agree with experiment. H…

Electron mobility in AlN from first principles
Amanda Wang, Nick Pant, Woncheol Lee, Jie-Cheng Chen, Feliciano Giustino, Emmanouil Kioupakis
https://arxiv.org/abs/2506.09240

Electron mobility in AlN from first principles
Aluminum nitride is a promising ultra-wide band gap semiconductor for optoelectronics and power electronics. However, its practical applications have been limited by challenges with doping and achieving high electrical conductivity. Recent advances in crystal quality and defect control have led to improvements in experimentally measured mobilities. In this work, we apply first-principles calculations to determine the upper limits of the electron mobility in AlN as a function of temperature, dop…

Optimizing Atomic Number Contrast in Multislice Electron Ptychography
Bridget R. Denzer, Colin Gilgenbach, James M. LeBeau
https://arxiv.org/abs/2506.09355

Optimizing Atomic Number Contrast in Multislice Electron Ptychography
Here we explore the atomic number ($Z$) dependence of multislice electron ptychography and approaches to optimize Z sensitivity. Specifically, we show that ptychography's $Z$-dependence is highly dependent on the integrated area of an atom column considered. A monotonic $Z$-dependence is found when the reconstructed projected atomic potentials are integrated over a small region. When increasing the integration area, $Z$-contrast changes significantly, becoming highly non-monotonic and following…

Theory of infrared magneto-optical effects from chiral phonons in solids
Chiara Fiorazzo, Cheol-Hwan Park, Ivo Souza, Matteo Calandra
https://arxiv.org/abs/2506.11258

Theory of infrared magneto-optical effects from chiral phonons in solids
In crystals with broken time-reversal symmetry, zone-center phonons can acquire a finite angular momentum via velocity-dependent forces on the nuclei. Despite having the same order of magnitude as the electron spin angular momentum, the phonon angular momentum can be hard to detect because the frequency splitting is small. Here, by developing a theory of lattice magneto-optical effects in reflection and transmission, we show that infrared magnetic circular dichroism is a sensitive probe of zone…

Surface Reduction Boosts Free Electron Concentration in MXene for Enhanced Photothermal Performance
Haoming Ding, Xiao Tong, Yong Zhang
https://arxiv.org/abs/2507.05741

Surface Reduction Boosts Free Electron Concentration in MXene for Enhanced Photothermal Performance
The photothermal properties of MXenes originate from their high free electron concentration, which drives localized surface plasmon resonance (LSPR). However, their intrinsic electron concentration is limited by suboptimal d-orbital occupancy, while electronegative surface terminations actively deplete free electrons through orbital-selective withdrawal. Herein, we report a sodium (Na)-mediated surface reduction strategy in molten salts to transform Ti3C2Clx into electronically tunable Ti3C2. S…