Tootfinder

This https://arxiv.org/abs/2011.08773 has been replaced.
link: https://scholar.google.com/scholar?q=a

Lyndon-Demushkin method and crystalline lifts of $G_2$-valued Galois representations
We show for all local fields $K/\mathbb{Q}_p$, with $p >3$, all representations $\barρ:G_K \to G_2(\bar{\mathbb{F}}_p)$ admit a crystalline lift $ρ: G_K\to G_2(\bar{\mathbb{Z}}_p)$, where $G_2$ is the exceptional Chevalley group of type $G_2$. The main ingredient is a new technique for analyzing the obstruction of non-abelian extensions of Galois modules, which has roots in combinatorial group theory. We also rely on the Emerton-Gee stack of $(ϕ, Γ)$-modules to construct abelian extension…

Higher-order topology protected by latent crystalline symmetries
L. Eek, M. R\"ontgen, A. Moustaj, C. Morais Smith
https://arxiv.org/abs/2405.02704 ht…

Higher-order topology protected by latent crystalline symmetries
We demonstrate that rotation symmetry is not a necessary requirement for the existence of fractional corner charges in Cn-symmetric higher-order topological crystalline insulators. Instead, it is sufficient to have a latent rotation symmetry, which may be revealed upon performing an isospectral reduction on the system. We introduce the concept of a filling anomaly for latent crystalline symmetric systems, and propose modified topological invariants. The notion of higher- order topology in two d…

Discrete-to-continuous crystalline curvature flows
Antonin Chambolle, Daniele De Gennaro, Massimiliano Morini
https://arxiv.org/abs/2403.04725 https://

Discrete-to-continuous crystalline curvature flows
We consider here a fully discrete variant of the implicit variational scheme for mean curvature flow [AlmTayWan,LucStu], in a setting where the flow is governed by a crystalline surface tension defined by the limit of pairwise interactions energy on the discrete grid. The algorithm is based on a new discrete distance from the evolving sets, which prevents the occurrence of the spatial drift and pinning phenomena identified in [BraGelNov] in a similar discrete framework. We provide the first rig…

Liquid Crystalline Assembly of Collagen for Deterministic Alignment and Spread of Human Schwann Cells
Homa Ghaiedi, Luis Carlos Pinzon Herrera, Saja Alshafeay, Leonard Harris, Jorge Almodovar, Karthik Nayani
https://arxiv.org/abs/2405.02948

Liquid Crystalline Assembly of Collagen for Deterministic Alignment and Spread of Human Schwann Cells
Collagen is a key component of the extracellular matrix and well-oriented domains of collagen are relevant for mimicking the local cell environment in vitro. While there has been significant attention directed towards the alignment of collagen, formation of large-scale oriented domains remains a key challenge. Type I collagen self-assembles to form liquid crystalline (LC) mesophases in acidic conditions at concentrations above 100 mg/ml. The LC mesophase provides an efficient platform for large…

Linear correlations of Gibbs free energy for rare earth element oxide, hydroxide, chloride, fluoride, carbonate, and ferrite minerals and crystalline solids
Ruiguang Pan, Chen Zhu
https://arxiv.org/abs/2405.03515

Linear correlations of Gibbs free energy for rare earth element oxide, hydroxide, chloride, fluoride, carbonate, and ferrite minerals and crystalline solids
Rare Earth Elements (REE) are critical minerals (metals) for the transition from fossil fuels to renewable and clean energy. Accurate thermodynamic properties of REE minerals and other crystalline solids are crucial for geochemical modeling of the solubility, speciation, and transport of REE in ore formation, extraction, chemical processing, and recycling processes. However, the Gibbs free energies of formation (DGof, REEX) for these solids from different sources vary by 10s kJ/mol. We applied …

Enhancement of the Curie temperature in single crystalline ferromagnetic LaCrGe$_3$ by electron irradiation-induced disorder
E. H. Krenkel, M. A. Tanatar, M. Konczykowski, R. Grasset, Lin-Lin Wang, S. L. Bud'ko, P. C. Canfield, R. Prozorov
https://arxiv.org/abs/2405.04429

Enhancement of the Curie temperature in single crystalline ferromagnetic LaCrGe$_3$ by electron irradiation-induced disorder
LaCrGe$_3$ has attracted attention as a potential candidate for studies of quantum phase transitions in a ferromagnetic material. The application of pressure avoids a quantum critical point by developing a new magnetic phase. It was suggested that the disorder may provide an alternative route to a quantum critical point. We used low-temperature 2.5 MeV electron irradiation to induce relatively small amounts of point-like disorder in single crystals of LaCrGe$_3$. Irradiation leads to an increas…

Liquid Crystalline Assembly of Collagen for Deterministic Alignment and Spread of Human Schwann Cells
Homa Ghaiedi, Luis Carlos Pinzon Herrera, Saja Alshafeay, Leonard Harris, Jorge Almodovar, Karthik Nayani
https://arxiv.org/abs/2405.02948

Liquid Crystalline Assembly of Collagen for Deterministic Alignment and Spread of Human Schwann Cells
Collagen is a key component of the extracellular matrix and well-oriented domains of collagen are relevant for mimicking the local cell environment in vitro. While there has been significant attention directed towards the alignment of collagen, formation of large-scale oriented domains remains a key challenge. Type I collagen self-assembles to form liquid crystalline (LC) mesophases in acidic conditions at concentrations above 100 mg/ml. The LC mesophase provides an efficient platform for large…

This https://arxiv.org/abs/2312.13372 has been replaced.
initial toot: https://mastoxiv.page/@…

Nonequilibrium Criticality at the Onset of Time-Crystalline Order
We explore the phase transitions at the onset of time-crystalline order in $O(N)$ models driven out-of-equilibrium. The spontaneous breaking of time translation symmetry and its Goldstone mode are captured by an effective description with $O(N)\times SO(2)$ symmetry. Using the renormalization group and the $ε=4-d$ expansion in a leading two-loop analysis, we identify a new non-equilibrium universality class. Strikingly, it controls the long-distance physics no matter how small the microscopic …

This https://arxiv.org/abs/2302.14092 has been replaced.
initial toot: https://mastoxiv.page/@a…

Elastic Liénard-Wiechert potentials of dynamical dislocations from tensor gauge theory in 2+1 dimensions
The dynamics of defect excitations in crystalline solids is necessary to understand the macroscopic low-energy properties of elastic media. We use fracton-elasticity duality to systematically study the defect dynamics and interactions in the linear isotropic medium. We derive the explicit expressions for the dual gauge potentials for moving dislocations and the resulting Jefimenko equations. We also compute stresses and strains. The paper includes two physical situations: when the vacancy numbe…

This https://arxiv.org/abs/2403.15487 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Spectral Analysis of Proton Eigenfunctions in Crystalline Environments
The Schrödinger equation and Bloch theorem are applied to examine a system of protons confined within a periodic potential, accounting for deviations from ideal harmonic behavior due to real-world conditions like truncated and non-quadratic potentials, in both one-dimensional and three-dimensional scenarios. Numerical computation of the energy spectrum of bound eigenfunctions in both cases reveals intriguing structures, including bound states with degeneracy matching the site number $N_w$, rem…

This https://arxiv.org/abs/2306.05735 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Optically addressable spin defects coupled to bound states in the continuum metasurfaces
Van der Waals (vdW) materials, including hexagonal boron nitride (hBN), are layered crystalline solids with appealing properties for investigating light-matter interactions at the nanoscale. hBN has emerged as a versatile building block for nanophotonic structures, and the recent identification of native optically addressable spin defects has opened up exciting possibilities in quantum technologies. However, these defects exhibit relatively low quantum efficiencies and a broad emission spectrum…

Tunable superconductivity in electron- and hole-doped Bernal bilayer graphene
Chushan Li, Fan Xu, Bohao Li, Jiayi Li, Guoan Li, Kenji Watanabe, Takashi Taniguchi, Bingbing Tong, Jie Shen, Li Lu, Jinfeng Jia, Fengcheng Wu, Xiaoxue Liu, Tingxin Li
https://arxiv.org/abs/2405.04479

Tunable superconductivity in electron- and hole-doped Bernal bilayer graphene
Graphene-based, high quality two-dimensional electronic systems have emerged as a highly tunable platform for studying superconductivity. Specifically, superconductivity has been observed in both electron-doped and hole-doped twisted graphene moire systems, whereas in crystalline graphene systems, superconductivity has so far only been observed in hole-doped rhombohedral trilayer and hole-doped Bernal bilayer graphene (BBG). Recently, enhanced superconductivity has been demonstrated in BBG due …

Chemically Tailored Growth of 2D Semiconductors via Hybrid Metal-Organic Chemical Vapor Deposition
Zhepeng Zhang, Lauren Hoang, Marisa Hocking, Jenny Hu, Gregory Zaborski Jr., Pooja Reddy, Johnny Dollard, David Goldhaber-Gordon, Tony F. Heinz, Eric Pop, Andrew J. Mannix
https://arxiv.org/abs/2403.03482

Chemically Tailored Growth of 2D Semiconductors via Hybrid Metal-Organic Chemical Vapor Deposition
Two-dimensional (2D) semiconducting transition-metal dichalcogenides (TMDCs) are an exciting platform for new excitonic physics and next-generation electronics, creating a strong demand to understand their growth, doping, and heterostructures. Despite significant progress in solid-source (SS-) and metal-organic chemical vapor deposition (MOCVD), further optimization is necessary to grow highly crystalline 2D TMDCs with controlled doping. Here, we report a hybrid MOCVD growth method that combine…

This https://arxiv.org/abs/2311.16092 has been replaced.
initial toot: https://mastoxiv.page/@a…

Three-dimensional $\mathbb{Z}$ topological insulators without reflection symmetry
In recent decades, the Altland-Zirnabuer (AZ) table has proven incredibly powerful in delineating constraints for topological classification of a given band-insulator based on dimension and (nonspatial) symmetry class, and has also been expanded by considering additional crystalline symmetries. Nevertheless, realizing a three-dimensional (3D), time-reversal symmetric (class AII) topological insulator (TI) in the absence of reflection symmetries, with a classification beyond the $\mathbb{Z}_{2}$…

This https://arxiv.org/abs/2310.15733 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Supernova Ejecta with Crystalline Silicate Dust in the Supernova Remnant MSH 15-52
IRAS 15099-5856 in the young supernova remnant (SNR) MSH 15-52 is the first and only SNR-associated object with crystalline silicate dust detected so far, although its nature and the origin of the crystalline silicate are still unclear. In this paper, we present high-resolution mid-infrared (MIR) imaging observations of the bright central compact source IRS1 of IRAS 15099-5856 to study the spatial distributions of gas and dust and the analysis of its Spitzer MIR spectrum to explore the origin o…

🔊 #NowPlaying on KEXP's #MechanicalBreakdown
Crystalline Stricture:
🎵 Shepherd
#CrystallineStricture
https://crystallinestricture.bandcamp.com/track/shepherd

Weak solutions of Anisotropic (and crystalline) inverse mean curvature flow as limits of $p$-capacitary potentials
Esther Cabezas-Rivas, Salvador Moll, Marcos Solera
https://arxiv.org/abs/2404.01668

Weak solutions of Anisotropic (and crystalline) inverse mean curvature flow as limits of $p$-capacitary potentials
We construct weak solutions of the anisotropic inverse mean curvature flow (A-IMCF) under very mild assumptions both on the anisotropy (which is simply a norm in $\mathbb R^N$ with no ellip\-ticity nor smoothness requirements, in order to include the crystalline case) and on the initial data. By means of an approximation procedure introduced by Moser, our solutions are limits of anisotropic $p$-harmonic functions or $p$-capacitary functions (after a change of variable), and we get uniqueness bo…

This https://arxiv.org/abs/2311.13311 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Liquid-solid friction on crystalline surfaces: a perspective
Liquids flowing against solid surfaces experience friction. While solid friction is familiar to anyone with a sense of touch, liquid friction is much more exotic. At macroscopic scales indeed, the assumption of inifinite friction, i.e. that interfacial liquid molecules stick to solid surfaces, is hard to disprove. Still, it has been known for a few decades that some materials exhibit very strong liquid slippage, leading to a dramatic increase in the permeability of nanoscale tubes to liquid flo…

Topologically trivial gap-filling in superconducting Fe(Se,Te) by one dimensional defects
A. Mesaros, G. D. Gu, F. Massee
https://arxiv.org/abs/2405.03748 …

Topologically trivial gap-filling in superconducting Fe(Se,Te) by one dimensional defects
Structural distortions and imperfections are a crucial aspect of materials science, on the macroscopic scale providing strength, but also enhancing corrosion and reducing electrical and thermal conductivity. At the nanometre scale, multi-atom imperfections, such as atomic chains and crystalline domain walls have conversely been proposed as a route to topological superconductivity, whose most prominent characteristic is the emergence of Majorana Fermions that can be used for error-free quantum c…

Bloch oscillations in a transmon embedded in a resonant electromagnetic environment
Benjamin Remez, Vladislav D. Kurilovich, Maximilian Rieger, Leonid I. Glazman
https://arxiv.org/abs/2403.04623

Bloch oscillations in a transmon embedded in a resonant electromagnetic environment
Recently developed Josephson junction array transmission lines implement strong-coupling circuit electrodynamics compatible with a range of superconducting quantum devices. They provide both the high impedance which allows for strong quantum fluctuations, and photon modes with which to probe a quantum device, such as a small Josephson junction. In this high-impedance environment, current through the junction is accompanied by charge Bloch oscillations analogous to those in crystalline systems. …

XtalOpt Version 13: Multi-Objective Evolutionary Search for Novel Functional Materials
Samad Hajinazar, Eva Zurek
https://arxiv.org/abs/2405.02138 https://…

XtalOpt Version 13: Multi-Objective Evolutionary Search for Novel Functional Materials
Version 13 of XtalOpt, an evolutionary algorithm for crystal structure prediction, is now available for download from the CPC program library or the XtalOpt website, https://xtalopt.github.io. In the new version of the XtalOpt code, a general platform for multi-objective global optimization is implemented. This functionality is designed to facilitate the search for (meta)stable phases of functional materials through minimization of the enthalpy of a crystalline system coupled with the simultane…

Measurement of the thermal accommodation coefficient of helium on a crystalline silicon surface at low-temperatures
Alexander Franke, Nils S\"ultmann, Christoph Reinhardt, Sandy Croatto, J\"orn Schaffran, Hossein Masalehdan, Axel Lindner, Roman Schnabel
https://arxiv.org/abs/2402.11977

Measurement of the thermal accommodation coefficient of helium on a crystalline silicon surface at low-temperatures
Next-generation gravitational wave observatories are expected to use cryogenically cooled, pendulum-suspended 200 kg test mass mirrors from a crystalline material such as crystalline silicon. During operation of the observatories, these mirrors undergo heating due to the absorption of laser radiation of up to a watt. Low noise cooling techniques need to be developed. Low-pressure helium exchange gas at 5 K might contribute to the challenging task. Here, we report the measurement of the helium a…

This https://arxiv.org/abs/2404.02647 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Ultrastable lasers: investigations of crystalline mirrors and closed cycle cooling at 124 K
We have investigated crystalline AlGaAs/GaAs optical coatings with three ultra-stable cavities operating at 4 K, 16 K, 124 K and 297 K. The response of the resonance frequencies of cavities to variations in optical power indicates effects beyond the photo-thermo-optic effect observed in dielectric coatings. These effects are strongly dependent on the intensity of the intracavity light at 1.5~\textmu m. When the rear side of the mirrors is illuminated with external light, we observe a prominent …

This https://arxiv.org/abs/2311.16875 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qu…

Spectral Multiplexing of Rare-earth Emitters in a Co-doped Crystalline Membrane
The spectral addressing of many individual rare-earth dopants in optical resonators offers great potential for realizing distributed quantum information processors. To this end, it is required to understand and control the spectral properties of the emitters in micron-scale devices. Here, erbium emitters are investigated in a Fabry-Perot resonator which contains a ten-micrometer-thin membrane of crystalline yttrium orthosilicate that is co-doped with europium. The co-doping allows for tailoring…

Deposition of highly-crystalline AlScN thin films using synchronized HiPIMS -- from combinatorial screening to piezoelectric devices
Jyotish Patidar (Empa, Swiss Federal Laboratories for Materials Science and Technology, D\"ubendorf, Switzerland), Kerstin Thorwarth (Empa, Swiss Federal Laboratories for Materials Science and Technology, D\"ubendorf, Switzerland), Thorsten Schmitz-Kempen (aixACCT Systems GmbH, Aachen, Germany), Roland Kessels (aixACCT Systems GmbH, Aachen, Germ…

Deposition of highly-crystalline AlScN thin films using synchronized HiPIMS -- from combinatorial screening to piezoelectric devices
Fueled by the 5G revolution, the demand for advanced radio frequency micro-electromechanical systems (MEMS) based on AlScN is growing rapidly. However, synthesizing high-quality, textured AlScN thin films is challenging. Current approaches typically rely on high temperatures and expensive compound targets. In this study, we demonstrate the feasibility of ionized physical vapor deposition to deposit highly oriented AlScN films with minimal defects at lower temperatures. Using metal-ion synchroni…

Prismatic crystals and $q$-Higgs fields
Takeshi Tsuji
https://arxiv.org/abs/2403.11676 https://arxiv.org/pdf/2403.11676

Prismatic crystals and $q$-Higgs fields
Similarly to the theory of crystalline cohomology, we give a local description of a prismatic crystal and its cohomology in terms of a $q$-Higgs module and the associated $q$-Higgs complex on the bounded prismatic envelope of an embedding into a framed smooth algebra, when the base bounded prism is defined over the $q$-crystalline prism. We also discuss its behavior under the scalar extension by the Frobenius lifting and tensor products, and a global description of the cohomology of a prismatic…

The bending rigidity exponent of a two-dimensional crystalline membrane with arbitrary number of flexural phonon modes
D. A. Ivanov, A. Kudlis, I. S. Burmistrov
https://arxiv.org/abs/2403.19005

The bending rigidity exponent of a two-dimensional crystalline membrane with arbitrary number of flexural phonon modes
We investigate the elastic behavior of two-dimensional crystalline membrane embedded into real space taking into account the presence an arbitrary number of flexural phonon modes $d_c$ (the number of out-of-plane deformation field components). The bending rigidity exponent $η$ is extracted by numerical simulation via Fourier Monte Carlo technique of the system behaviour in the universal regime. This universal quantity governess the correlation function of out-of-plane deformations at long wave…

This https://arxiv.org/abs/2403.02033 has been replaced.
link: https://scholar.google.com/scholar?q=a

He-4 monolayer on Graphene: a Quantum Monte Carlo study
We revisit the problem of adsorption of a single He-4 layer on graphene, focusing on the commensurate C1/3 crystalline phase, specifically on whether it may possess a nonzero superfluid response, and on the existence of superfluid phases, either (metastable) liquid or vacancy-doped crystalline. We make use of canonical Quantum Monte Carlo simulations at zero and finite temperature, based on a realistic microscopic model of the system. Our results confirm the absence of any superfluid response i…

Some mounts that I have either purchased or acquired over the last couple of days. #ffxiv #gaming #mmorpg @…
1) Crescent Moon - Bought from the FFXIV Store
2) Peatie - Acquired from the Little Ladies Day & Hatchingtide seasonal event.
3) Gloria-class Airship - Acquired from winning 200 Crystalline Conflict Matches.

Directed Aggregation of Cellulose Nanocrystals to Enhance Chiral Twist
K\'evin Ballu, Jia-Hui Lim, Thomas G. Parton, Richard M. Parker, Bruno Frka-Petesic, Alexei A. Lapkin, Yu Ogawa, Silvia Vignolini
https://arxiv.org/abs/2404.04171

Directed Aggregation of Cellulose Nanocrystals to Enhance Chiral Twist
Cellulose nanocrystals (CNCs) are bioderived nanoparticles that can be isolated from any source of natural cellulose via sulfuric acid hydrolysis. Arising from a combination of the negatively-charged sulfate half-ester groups grafted during this process and their elongated morphology, CNCs typically form colloidal cholesteric liquid crystalline phases in aqueous suspension. Recently, the chiral strength of such a CNC mesophase was correlated to the presence of CNCs with a 'bundle' morphology, a…

This https://arxiv.org/abs/2303.05452 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nuc…

Probing spherical outbursts of neutron star mergers from an equation of state with composite nucleons
We consider a variational 'crystalline' equation of state (EOS) that follows from nucleons that are chiral solitons with deep relativistic quark bound states. In this model conventional quark matter does not occur till a high density threshold at which the quark bound states in the nucleons get compressed and merge with the continuum. Once the barrier at this threshold is overcome, roughly when, $n_B \sim 1/fm^3$, we expect the 'crystalline' nuclear matter to make a sudden transition into quark…

Reversible single-pulse laser-induced phase change of Sb$_2$S$_3$ thin films: multi-physics modeling and experimental demonstrations
Capucine Laprais, Cl\'ement Zrounba, Julien Bouvier, Nicholas Blanchard, Matthieu Bugnet, Yael Guti\'errez, Saul Vazquez-Miranda, Shirly Espinoza, Peter Thiesen, Romain Bourrellier, Aziz Benamrouche, Nicolas Baboux, Guillaume Saint-Girons, Lotfi Berguiga, S\'ebastien Cueff

Reversible single-pulse laser-induced phase change of Sb$_2$S$_3$ thin films: multi-physics modeling and experimental demonstrations
Phase change materials (PCMs) have gained a tremendous interest as a means to actively tune nanophotonic devices through the large optical modulation produced by their amorphous to crystalline reversible transition. Recently, materials such as Sb$_2$S$_3$ emerged as particularly promising low loss PCMs, with both large refractive index modulations and transparency in the visible and NIR. Controlling the local and reversible phase transition in this material is of major importance for future app…

Ultrastable lasers: investigations of crystalline mirrors and closed cycle cooling at 124 K
C. Y. Ma, J. Yu, T. Legero, S. Herbers, D. Nicolodi, M. Kempkes, F. Riehle, D. Kedar, J. M. Robinson, J. Ye, U. Sterr
https://arxiv.org/abs/2404.02647

Ultrastable lasers: investigations of crystalline mirrors and closed cycle cooling at 124 K
We have investigated crystalline AlGaAs/GaAs optical coatings with three ultra-stable cavities operating at 4 K, 16 K, 124 K and 297 K. The response of the resonance frequencies of cavities to variations in optical power indicates effects beyond the photo-thermo-optic effect observed in dielectric coatings. These effects are strongly dependent on the intensity of the intracavity light at 1.5~\textmu m. When the rear side of the mirrors is illuminated with external light, we observe a prominent …

This https://arxiv.org/abs/2310.07978 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Anderson localization transition in disordered hyperbolic lattices
We study Anderson localization in disordered tight-binding models on hyperbolic lattices. Such lattices are geometries intermediate between ordinary two-dimensional crystalline lattices, which localize at infinitesimal disorder, and Bethe lattices, which localize at strong disorder. Using state-of-the-art computational group theory methods to create large systems, we approximate the thermodynamic limit through appropriate periodic boundary conditions and numerically demonstrate the existence of…

This https://arxiv.org/abs/2312.07411 has been replaced.
initial toot: https://mastoxiv.page/@a…

Breakdown of the Born-Oppenheimer approximation in LiH and LiD
We compute the ab-initio electron density beyond the Born-Oppenheimer approximation in crystalline LiH and LiD with density functional methods. We report significant beyond Born-Oppenheimer corrections to electron density in the vicinity of nuclei equilibrium positions. We thus verify the breakdown of the Born-Oppenheimer approximation, as earlier suggested on experimental grounds. A reasonable agreement between the experimental and computational results is found. The results indicate the exist…

On Modeling Tear Breakup Dynamics with a Nematic Lipid Layer
M. J. Taranchuk, R. J. Braun
https://arxiv.org/abs/2404.17003 https://ar…

On Modeling Tear Breakup Dynamics with a Nematic Lipid Layer
One of the main roles of the lipid layer (LL) of the tear film (TF) is to help prevent evaporation of the aqueous layer (AL). The LL thickness, composition, and structure all contribute to its barrier function. It is believed that the lipid layer is primarily nonpolar with a layer of polar lipids at the LL/AL interface. There is evidence that the nonpolar region of the LL may have liquid crystalline characteristics. We investigate the structure and function of the LL via a model of the tear fil…

Crystal, ferromagnetism, and magnetoresistance with sign reversal in a EuAgP semiconductor
Qian Zhao, Kaitong Sun, Si Wu, Hai-Feng Li
https://arxiv.org/abs/2403.03650

Crystal, ferromagnetism, and magnetoresistance with sign reversal in a EuAgP semiconductor
We synthesized the ferromagnetic EuAgP semiconductor and conducted a comprehensive study of its crystalline, magnetic, heat capacity, band gap, and magnetoresistance properties. Our investigation utilized a combination of X-ray diffraction, optical, and PPMS DynaCool measurements. EuAgP adopts a hexagonal structure with the $P6_3/mmc$ space group. As the temperature decreases, it undergoes a magnetic phase transition from high-temperature paramagnetism to low-temperature ferromagnetism. We dete…

Thermal conductivity reduction due to phonon geometrical scattering in nano-engineered epitaxial germanium
Jessy Paterson (NEEL), Sunanda Mitra (NEEL), Yanqing Liu (NEEL), Mustapha Boukhari (DRF), Dhruv Singhal (NEEL), David Lacroix (DRF), Emmanuel Hadji (DRF), Andr\'e Barski (DRF), Dimitri Tainoff (NEEL), Olivier Bourgeois (NEEL)
https://…

Thermal conductivity reduction due to phonon geometrical scattering in nano-engineered epitaxial germanium
Nano-engineering crystalline materials can be used to tailor their thermal properties. By adding new nanoscale phonon scattering centers and controlling their size, one can effectively decrease the phonon mean free path and hence the thermal conductivity of a fully crystalline material. In this letter, we use the 3$ω$ method in the temperature range of 100-300 K to experimentally report on the more than threefold reduction of the thermal conductivity of an epitaxially-grown crystalline germani…

Scalable Multipartite Entanglement of Remote Rare-earth Ion Qubits
Andrei Ruskuc, Chun-Ju Wu, Emanuel Green, Sophie L. N. Hermans, Joonhee Choi, Andrei Faraon
https://arxiv.org/abs/2402.16224

Scalable Multipartite Entanglement of Remote Rare-earth Ion Qubits
Single photon emitters with internal spin are leading contenders for developing quantum repeater networks, enabling long-range entanglement distribution for transformational technologies in communications and sensing. However, scaling beyond current few-node networks will require radical improvements to quantum link efficiencies and fidelities. Solid-state emitters are particularly promising due to their crystalline environment, enabling nanophotonic integration and providing spins for memory a…

Phase and morphology of water-ice grains formed in a cryogenic laboratory plasma
Andr\'e Nicolov, Murthy S. Gudipati, Paul M. Bellan
https://arxiv.org/abs/2404.16396

Phase and morphology of water-ice grains formed in a cryogenic laboratory plasma
Grains of ice are formed spontaneously when water vapor is injected into a weakly-ionized laboratory plasma in which the background gas has been cooled to cryogenic temperatures comparable to those of deep space. These ice grains are levitated indefinitely within the plasma so that their time evolution can be observed under free-floating conditions. Using microscope imaging, ice grains are shown to have a spindle-like fractal structure and grow over time. Both crystalline and amorphous phases o…

Logarithmic A$_{\rm inf}$-cohomology
Hansheng Diao, Zijian Yao
https://arxiv.org/abs/2402.15154 https://arxiv.org/pdf/2402.15154

Logarithmic A$_{\rm inf}$-cohomology
We extend the construction of A$_{\rm inf}$-cohomology by Bhatt-Morrow-Scholze to the context of log $p$-adic formal schemes over a log perfectoid base. In particular, using coordinates, we prove comparison theorems between log A$_{\rm inf}$-cohomology with other $p$-adic cohomology theories, including log de Rham, log (q-)crystalline, log prismatic, and Kummer étale cohomology, as well as the derived A$_{\rm inf}$-cohomology of certain infinite root stacks. Along the way, we define and give a…

This https://arxiv.org/abs/2303.05452 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nuc…

Probing spherical outbursts of neutron star mergers from an equation of state with composite nucleons
We consider a variational 'crystalline' equation of state (EOS) that follows from nucleons that are chiral solitons with deep relativistic quark bound states. In this model conventional quark matter does not occur till a high density threshold at which the quark bound states in the nucleons get compressed and merge with the continuum. Once the barrier at this threshold is overcome, roughly when, $n_B \sim 1/fm^3$, we expect the 'crystalline' nuclear matter to make a sudden transition into quark…

This https://arxiv.org/abs/2311.10109 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Configurational and Vibrational Entropy in Hydrogen-bonded Fluids
The thermodynamics of liquids and supercritical fluids is notorious for eluding a general theory, as can be done for crystalline solids on the basis of phonons and crystal symmetry. The extension of solid state notions such as configurational entropy and phonons to the liquid state remains an intriguing but challenging topic. This is particularly true for liquids like water whose many structural anomalies give it unique properties. Here, for simple fluids, we specify the thermodynamics across t…

Machine Learning a Universal Harmonic Interatomic Potential for Predicting Phonons in Crystalline Solids
Huiju Lee, Yi Xia
https://arxiv.org/abs/2402.11383

Machine Learning a Universal Harmonic Interatomic Potential for Predicting Phonons in Crystalline Solids
Phonons, as quantized vibrational modes in crystalline materials, play a crucial role in determining a wide range of physical properties, such as thermal and electrical conductivity, making their study a cornerstone in materials science. In this study, we present a simple yet effective strategy for deep learning harmonic phonons in crystalline solids by leveraging existing phonon databases and state-of-the-art machine learning techniques. The key of our method lies in transforming existing phon…

Scalable Multipartite Entanglement of Remote Rare-earth Ion Qubits
Andrei Ruskuc, Chun-Ju Wu, Emanuel Green, Sophie L. N. Hermans, Joonhee Choi, Andrei Faraon
https://arxiv.org/abs/2402.16224

Scalable Multipartite Entanglement of Remote Rare-earth Ion Qubits
Single photon emitters with internal spin are leading contenders for developing quantum repeater networks, enabling long-range entanglement distribution for transformational technologies in communications and sensing. However, scaling beyond current few-node networks will require radical improvements to quantum link efficiencies and fidelities. Solid-state emitters are particularly promising due to their crystalline environment, enabling nanophotonic integration and providing spins for memory a…

Avalanche Dynamics and the Effect of Straining in Dislocation Systems with Quenched Disorder
D\'enes Berta, Barna Mendei, P\'eter Dus\'an Isp\'anovity
https://arxiv.org/abs/2404.18871

Avalanche Dynamics and the Effect of Straining in Dislocation Systems with Quenched Disorder
The plastic deformation of crystalline and other heterogeneous materials often manifests in stochastic intermittent events indicating the criticality of plastic behavior. Previous studies demonstrated that the presence of short-ranged quenched disorder modifies this behavior disrupting long-range static and dynamic correlations consequently localizing dislocation avalanches. However, these observations were mostly confined to relaxed materials devoid of deformation history. In this work our foc…

Fine-tuning the Microstructure and Photophysical Characteristics of Fluorescent Conjugated Copolymers Using Photoalignment and Liquid-crystalline Ordering
Yuping Shi, Katharina Landfester, Stephen M. Morris
https://arxiv.org/abs/2404.19435

Fine-tuning the Microstructure and Photophysical Characteristics of Fluorescent Conjugated Copolymers Using Photoalignment and Liquid-crystalline Ordering
Replicating the microstructure and near-unity excitation energy transfer efficiency in natural light-harvesting complexes (LHCs) remains a major challenge for synthetic energy-harvesting devices. Biological photosynthesis can spontaneously regulate the active ensembles of involved energy absorbing and funnelling chlorophyll-containing proteins in response to fluctuating sunlight. Here we utilize liquid crystalline (LC) ordering to fine-tune the polymer packing and photophysical properties in li…

Spectral Analysis of Proton Eigenfunctions in Crystalline Environments
L. Gamberale, G. Modanese
https://arxiv.org/abs/2403.15487 https://

Spectral Analysis of Proton Eigenfunctions in Crystalline Environments
A system with protons confined in a periodic potential is examined using the Schrödinger equation and the Bloch theorem. Real-world conditions introduce deviations from an ideal harmonic system due to truncated and non-quadratic potentials. The energy spectrum of bound eigenfunctions is derived, independent from the crystal momentum vector $\vec K$. Numerical solutions reveal intriguing structures in the system, including bound states with degeneracy equal to site number $N_w$ resembling a fin…

High entropy metallic glasses, what does it mean?
G. V. Afonin, J. C. Qiao, A. S. Makarov, R. A. Konchakov, E. V. Goncharova, N. P. Kobelev, V. A. Khonik
https://arxiv.org/abs/2403.20115

High entropy metallic glasses, what does it mean?
We performed calorimetric measurements on 30 bulk metallic glasses differing with their mixing entropies DSmix. On this basis, the excess entropies DS and excess enthalpies DH of glasses with respect to their maternal crystalline states are calculated. It is found that the excess entropy DS on the average decreases with increasing mixing entropy DSmix. This means that so-called "high-entropymetallic glasses" (i.e. the glasses having high DSmix) actually constitute glasses with low excess entrop…

Josephson effect in a fractal geometry
Morten Amundsen, Vladimir Juri\v{c}i\'c, Jabir Ali Ouassou
https://arxiv.org/abs/2404.01373 https://

Josephson effect in a fractal geometry
The Josephson effect is a hallmark signature of the superconducting state, which, however, has been sparsely explored in non-crystalline superconducting materials. Motivated by this, we consider a Josephson junction consisting of two superconductors with a fractal metallic interlayer, which is patterned as a Sierpiński carpet by removing atomic sites in a self-similar and scale-invariant manner. We here show that the fractal geometry has direct observable consequences on the Josephson effect. …

Electronic ferroelectricity in monolayer graphene for multifunctional neuromorphic electronics
Le Zhang, Jing Ding, Hanxiao Xiang, Naitian Liu, Wenqiang Zhou, Linfeng Wu, Na Xin, Kenji Watanabe, Takashi Taniguchi, Shuigang Xu
https://arxiv.org/abs/2404.03410

Electronic ferroelectricity in monolayer graphene for multifunctional neuromorphic electronics
Ferroelectricity is intriguing for its spontaneous electric polarization, which is switchable by an external electric field. Expanding ferroelectric materials to two-dimensional limit will provide versatile applications for the development of next-generation nonvolatile devices. Conventional ferroelectricity requires the materials consisting of at least two constituent elements associated with polar crystalline structures. Monolayer graphene as an elementary two-dimensional material unlikely ex…

A Strong Form of the Quantitative Wulff Inequality for Crystalline Norms
Kenneth DeMason
https://arxiv.org/abs/2402.06813 https://arx…

A Strong Form of the Quantitative Wulff Inequality for Crystalline Norms
Quantitative stability for crystalline anisotropic perimeters, with control on the oscillation of the boundary with respect to the corresponding Wulff shape, is proven for $n\geq 3$. This extends a result of [Neu16] in $n=2$.

This https://arxiv.org/abs/2307.11537 has been replaced.
initial toot: https://mastoxiv.page/@a…

Double glass transition in polyethylene naphthalate structural relaxation by MDSC, BDS and TSDC
In this work, we present an experimental study of the primary and secondary relaxations of the semi-crystalline polymer polyethylene naphthalate (PEN), by Modulated Differential Scanning Calorimetry (MDSC), Thermally Stimulated Depolarization Currents (TSDC) and Broadband Dielectric Spectroscopy (BDS), and how they are affected by physical aging. Three dipolar relaxation modes can be observed: (from slowest to fastest) the primary $α$ relaxation, which vitrifies at the glass transition tempera…

Evolution of Shielding Cloud Under Oscillatory External Forcing in Strongly Coupled Ultracold Neutral Plasma
Mamta Yadav, Aman Singh Katariya, Animesh Sharma, Amita Das
https://arxiv.org/abs/2404.14861

Evolution of Shielding Cloud Under Oscillatory External Forcing in Strongly Coupled Ultracold Neutral Plasma
This paper investigates the dynamics of crystalline clusters observed in Molecular Dynamics (MD) studies conducted earlier [Yadav, M., et al. Physical Review E, 107(5), 055214(2023)] for ultra-cold neutral plasmas. An external oscillatory forcing is applied for this purpose and the evolution is tracked with the help of MD simulations using the open source LAMMPS software. Interesting observations relating to cluster dynamics are presented. The formation of a pentagonal arrangement of particles …

Plastic instability of annular crystalline membrane in circular confinement
Honghui Sun, Zhenwei Yao
https://arxiv.org/abs/2404.17797 https://

Plastic instability of annular crystalline membrane in circular confinement
Understanding the mechanical instabilities of two-dimensional membranes has strong connection to the subjects of structure instabilities, morphology control and materials failures. In this work, we investigate the plastic mechanism developed in the annular crystalline membrane system for adapting to the shrinking space, which is caused by the controllable gradual expansion of the inner boundary. In the process of plastic deformation, we find the continuous generation of dislocations at the inne…

On the Effect of Liquid Crystal Orientation in the Lipid Layer on Tear Film Thinning and Breakup
M. J. Taranchuk, R. J. Braun
https://arxiv.org/abs/2404.13225

On the Effect of Liquid Crystal Orientation in the Lipid Layer on Tear Film Thinning and Breakup
The human tear film (TF) is thin multilayer fluid film that is critical for clear vision and ocular surface health. Its dynamics are strongly affected by a floating lipid layer and, in health, that layer slows evaporation and helps create a more uniform tear film over the ocular surface. The tear film lipid layer (LL) may have liquid crystalline characteristics and plays important roles in the health of the tear film. Previous models have treated the lipid layer as a Newtonian fluid in extensio…

Elucidating Structure Formation in Highly Oriented Triple Cation Perovskite Films
Oscar Telschow, Niels Scheffczyk, Alexander Hinderhofer, Lena Merten, Ekaterina Kneschaurek, Florian Bertram, Qi Zhou, Markus L\"offler, Frank Schreiber, Fabian Paulus, Yana Vaynzof
https://arxiv.org/abs/2404.12413

Elucidating Structure Formation in Highly Oriented Triple Cation Perovskite Films
Metal halide perovskites are an emerging class of crystalline semiconductors of great interest for application in optoelectronics. Their properties are dictated not only by their composition, but also by their crystalline structure and microstructure. While significant efforts were dedicated to the development of strategies for microstructural control, significantly less is known about the processes that govern the formation of their crystalline structure in thin films, in particular in the con…

Interacting Crystalline Topological Insulators in 2D with Spin-Orbit Coupling
Martina O. Soldini, \"Omer M. Aksoy, Titus Neupert
https://arxiv.org/abs/2404.11650

Interacting Crystalline Topological Insulators in 2D with Spin-Orbit Coupling
Topology is routinely used to understand the physics of electronic insulators. However, for strongly interacting electronic matter, such as Mott insulators, a comprehensive topological characterization is still lacking. When their ground state only contains short range entanglement and does not break symmetries spontaneously, they generically realize crystalline symmetry protected topological phases (cFSPTs), supporting gapless modes at the boundaries or at the lattice defects. Here, we provide…

This https://arxiv.org/abs/2401.16980 has been replaced.
initial toot: https://mastoxiv.page/@a…

Two-Dimensional Phase-Fluctuating Superconductivity in Bulk-Crystalline NdO$_{0.5}$F$_{0.5}$BiS$_2$
We present a combined growth and transport study of superconducting single-crystalline NdO$_{0.5}$F$_{0.5}$BiS$_2$. Evidence of two-dimensional superconductivity with significant phase fluctuations of preformed Cooper pairs preceding the superconducting transition is reported. This result is based on three key observations. (1) The resistive superconducting transition temperature $T_c$ (defined by resistivity $ρ\rightarrow 0$) increases with increasing disorder. (2) As $T\rightarrow T_c$, the …

Cryogenic sapphire optical reference cavity with crystalline coatings at $\mathrm{ 1 \times 10^{-16}}$ fractional instability
Jose Valencia, George Iskander, Nicholas V. Nardelli, David R. Leibrandt, David B. Hume
https://arxiv.org/abs/2404.14310

Cryogenic sapphire optical reference cavity with crystalline coatings at $\mathrm{ 1 \times 10^{-16}}$ fractional instability
The frequency stability of a laser locked to an optical reference cavity is fundamentally limited by thermal noise in the cavity length. These fluctuations are linked to material dissipation, which depends both on the temperature of the optical components and the material properties. Here, the design and experimental characterization of a sapphire optical cavity operated at 10 K with crystalline coatings at 1069 nm is presented. Theoretical estimates of the thermo-mechanical noise indicate a th…

Glass clarified as the self-organizing system
Elena A. Chechetkina
https://arxiv.org/abs/2405.00346 https://arxiv.org/pdf/2405.00346<…

Glass clarified as the self-organizing system
The synergetic approach proposed here is based on characteristic instability of chemical bonding in the form of the bond wave.The model explains characteristic hierarchical structure, including non-crystalline long-range order, the semi-deterministic behavior of properties, and a role of information fields for adaptation of glassy material to a current medium.

This https://arxiv.org/abs/2403.10337 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Nonlinear charge transport properties in chiral tellurium
Extensive research has focused on phenomena arising from the chirality of crystalline or magnetic structures. Recently, we have proposed the "Nonlinear Chiral Thermo-Electric (NCTE) Hall effect," in which current flows in the direction of the cross product of the electric field and the temperature gradient in a material with a chiral structure. Despite its importance for device applications such as heat flow sensors and logic circuits, there are no quantitative demonstrations in actual material…

Unraveling the collinearity in short-range order parameters for lattice configurations arising from topological constraints
Abhijit Chatterjee
https://arxiv.org/abs/2403.18380

Unraveling the collinearity in short-range order parameters for lattice configurations arising from topological constraints
In multicomponent lattice problems, e.g., in alloys, and at crystalline surfaces and interfaces, atomic arrangements exhibit spatial correlations that dictate the kinetic and thermodynamic phase behavior. These correlations emerge from interparticle interactions and are frequently reported in terms of the short-range order (SRO) parameter. Expressed usually in terms of pair distributions and other cluster probabilities, the SRO parameter gives the likelihood of finding atoms/molecules of a part…

Environment-adaptive machine learning potentials
Ngoc Cuong Nguyen, Dionysios Sema
https://arxiv.org/abs/2405.00306 https://arxiv.org…

Environment-adaptive machine learning potentials
The development of interatomic potentials that can effectively capture a wide range of atomic environments is a complex challenge due to several reasons. Materials can exist in numerous structural forms (e.g., crystalline, amorphous, defects, interfaces) and phases (solid, liquid, gas, plasma). Each form may require different treatment in potential modeling to reflect the real physical behavior correctly. Atoms interact through various forces such as electrostatic, van der Waals, ionic bonding,…

The effect of niobium thin film structure on losses in superconducting circuits
Maxwell Drimmer, Sjoerd Telkamp, Felix L. Fischer, Ines C. Rodrigues, Clemens Todt, Filip Krizek, Dominik Kriegner, Christoph M\"uller, Werner Wegscheider, Yiwen Chu
https://arxiv.org/abs/2403.12164

The effect of niobium thin film structure on losses in superconducting circuits
The performance of superconducting microwave circuits is strongly influenced by the material properties of the superconducting film and substrate. While progress has been made in understanding the importance of surface preparation and the effect of surface oxides, the complex effect of superconductor film structure on microwave losses is not yet fully understood. In this study, we investigate the microwave properties of niobium resonators with different crystalline properties and related surfac…

Novel Topological Insulators with Hybrid-order Boundary States
Yan-Qing Zhu, Zhen Zheng, Giandomenico Palumbo, Z. D. Wang
https://arxiv.org/abs/2404.19469 …

Novel Topological Insulators with Hybrid-order Boundary States
We report the discovery of several classes of novel topological insulators (TIs) with hybrid-order boundary states generated from the first-order TIs with additional crystalline symmetries. Unlike the current studies on hybrid-order TIs where different-order topology arises from merging different-order TIs in various energy, these novel TIs exhibit a remarkable coexsitence of first-order gapless modes and higher-order Fermi-arc states, behaving as a hybrid between the first-order TIs and higher…

This https://arxiv.org/abs/2401.04823 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Deep learning surrogate for predicting hydraulic conductivity tensors from stochastic discrete fracture-matrix models
Simulating 2D flow in fractured crystalline rock requires 2D stochastic discrete-fracture matrix (DFM) models. To obtain the simulation statistics of interest at an affordable computational cost, we aim to use the multilevel Monte Carlo method. To use this multiscale approach, one needs to upscale the hydraulic conductivity of the fractures by numerical homogenization. In this work, we substitute numerical homogenization with a surrogate model to speed up the computations. In particular, we res…

Experimental demonstration of frequency downconverted arm length stabilization for a future upgraded gravitational wave detector
Satoshi Tanioka, Bin Wu, Stefan W. Ballmer
https://arxiv.org/abs/2405.01475

Experimental demonstration of frequency downconverted arm length stabilization for a future upgraded gravitational wave detector
Ground-based laser interferometric gravitational wave detectors consist of complex multiple optical cavity systems. An arm-length stabilization (ALS) system has played an important role in bringing such complex detector into operational state and enhance the duty cycle. The sensitivity of these detectors can be improved if the thermal noise of their test mass mirror coatings is reduced. Crystalline AlGaAs coatings are a promising candidate for this. However, traditional ALS system with frequenc…

Negative transit time in non-tunneling electron transmission through graphene multilayers
E. E. Krasovskii, R. O. Kuzian
https://arxiv.org/abs/2404.19440 h…

Negative transit time in non-tunneling electron transmission through graphene multilayers
Attosecond dynamics of electron transmission through atomically-thin crystalline films is studied with an {\em ab initio} scattering theory. The temporal character of the electron propagation through graphene multilayers is traced to the band structure of bulk graphite: In the forbidden gaps the wave packet transit time $τ_\mathrm{T}$ saturates with thickness and in the allowed bands $τ_\mathrm{T}$ oscillates following transmission resonances. Hitherto unknown negative transit time due to in-…

This https://arxiv.org/abs/2402.08738 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Universal stress correlations in crystalline and amorphous packings
We present a universal characterization of stress correlations in athermal systems, across crystalline to amorphous packings. Via numerical analysis of static configurations of particles interacting through harmonic as well as Lennard-Jones potentials, for a variety of preparation protocols and ranges of microscopic disorder, we show that the properties of the stress correlations at large lengthscales are surprisingly universal across all situations, independent of structural correlations, or t…

First-order rhombohedral to cubic phase transition in photoexcited GeTe
Matteo Furci, Giovanni Marini, Matteo Calandra
https://arxiv.org/abs/2404.19339 htt…

First-order rhombohedral to cubic phase transition in photoexcited GeTe
Photoexcited GeTe undergoes a non-thermal phase transition from a rhombohedral to a rocksalt crystalline phase. The microscopic mechanism and the nature of the transition are unclear. By using constrained density functional perturbation theory and by accounting for quantum anharmonicity within the stochastic self-consistent harmonic approximation, we show that the non-thermal phase transition is strongly first order and does not involve phonon softening, at odd with the thermal one. The transit…

Controlled creation of point defects in 3D colloidal crystals
Max P. M. Schelling, Janne-Mieke Meijer
https://arxiv.org/abs/2403.00678 https://

Controlled creation of point defects in 3D colloidal crystals
Crystal defects crucially influence the properties of crystalline materials and have been extensively studied. Even for the simplest type of defect - the point defect - however, basic properties such as their diffusive behavior, and their interactions, remain elusive on the atomic scale. Here we demonstrate in-situ control over the creation of isolated point defects in a 3D colloidal crystal allowing insight on a single particle level. Our system consists of thermoresponsive microgel particles …

This https://arxiv.org/abs/2403.02033 has been replaced.
link: https://scholar.google.com/scholar?q=a

He-4 monolayer on Graphene: a Quantum Monte Carlo study
We revisit the problem of adsorption of a single He-4 layer on graphene, focusing on the commensurate C1/3 crystalline phase, specifically on whether it may possess a nonzero superfluid response, and on the existence of superfluid phases, either (metastable) liquid or vacancy-doped crystalline. We make use of canonical Quantum Monte Carlo simulations at zero and finite temperature, based on a realistic microscopic model of the system. Our results confirm the absence of any superfluid response i…

This https://arxiv.org/abs/2402.13947 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Circular dichroism in perturbative harmonic generation in achiral nanostructures under vortex beam irradiation
In this study, we investigate the nonlinear optical phenomena emerging from the interaction of vortex beams with achiral nanoparticles, leading to the observation of nonlinear circular dichroism in the perturbative high-harmonic generation. Despite the achiral symmetry of the nanoparticles, the interplay between the vector properties of the light, the symmetry of the nanoparticles, and the symmetry of the crystalline lattice of the nanoparticle material results in circular dichroism in the nonl…

Influence of high pressure on Ce3 luminescence in LuAlO3 and YAlO3 single crystals and single crystalline layers
Lev Ivan Bulyk, Ajeesh Kumar Somakumar, Hanka Przybyli\'nska, P. Ciepielewski, Yu. Zorenko, Ya. Zhydachevskyy, I. Kudryavtseva, V. Gorbenko, A. Lushchik, M. G. Brik, Y. Syrotych, S. Witkiewicz-{\L}ukaszek, A. Fedorov, Andrzej Suchocki

Influence of high pressure on Ce3+ luminescence in LuAlO3 and YAlO3 single crystals and single crystalline layers
Results of spectroscopic studies at ambient and high pressures of a LuAlO3:Ce3+ (LuAP:Ce) single crystalline film (SCF) as well as LuAP:Ce and YAlO3:Ce (YAP:Ce) single crystals are reported. Room temperature absorption measurements of the single crystals in the vacuum UV region allowed establishing the bandgap energies of 7.63 eV for YAP and 7.86 eV for LuAP, with an assumption of the direct band-gaps. Luminescence of Ce3+ in LuAP and YAP bulk crystals was measured as a function of temperature …

Approach and rotation of reconnecting topological defect lines in liquid crystal
Yohei Zushi, Cody D. Schimming, Kazumasa A. Takeuchi
https://arxiv.org/abs/2404.01480

Approach and rotation of reconnecting topological defect lines in liquid crystal
Topological defects are a universal concept across many disciplines, such as crystallography, liquid-crystalline physics, low-temperature physics, cosmology, and even biology. In nematic liquid crystals, topological defects called disclinations have been widely studied. For their three-dimensional (3D) dynamics, however, only recently have theoretical approaches dealing with fully 3D configurations been reported. Further, recent experiments have observed 3D disclination line reconnections, a ph…

This https://arxiv.org/abs/2204.10296 has been replaced.
link: https://scholar.google.com/scholar?q=a

Nanoscale electrostatic control in ultra clean van der Waals heterostructures by local anodic oxidation of graphite gates
In an all-van der Waals heterostructure, the active layer, gate dielectrics and gate electrodes are assembled from two-dimensional crystals that have a low density of atomic defects. This design allows two-dimensional electron systems with very low disorder to be created, particularly in heterostructures where the active layer also has intrinsically low disorder, such as crystalline graphene layers or metal dichalcogenide heterobilayers. A key missing ingredient has been nanoscale electrostatic…

This https://arxiv.org/abs/2302.03639 has been replaced.
initial toot: https://mastoxiv.page/@a…

Modelling structure and ionic diffusion in a class of ionic liquid crystal-based solid electrolytes
Next-generation high-efficiency Li-ion batteries require an electrolyte that is both safe and thermally stable. A possible choice for high performance all-solid-state Li-ion batteries is a liquid crystal, which possesses properties in-between crystalline solids and isotropic liquids. By employing molecular dynamics simulations together with various experimental techniques, we have designed and analyzed a novel liquid crystal electrolyte composed of rigid naphthalene-based moieties as mesogenic …

This https://arxiv.org/abs/2309.13262 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Theory of polygonal phases self-assembled from T-shaped liquid crystalline molecules
Extensive experimental studies have shown that numerous ordered phases can be formed via the self-assembly of T-shaped liquid crystalline molecules (TLCMs) composed of a rigid backbone, two flexible end chains and a flexible side chain. However, a comprehensive understanding of the stability and formation mechanisms of these intricately nanostructured phases remains incomplete. Here we fill this gap by carrying out a theoretical study of the phase behaviour of TLCMs. Specifically, we construct …

Detecting the N\'{e}el vector of altermagnet by attaching a topological insulator and crystalline valley-edge insulator
Motohiko Ezawa
https://arxiv.org/abs/2403.09150

Detecting the Néel vector of altermagnet by attaching a topological insulator and crystalline valley-edge insulator
In order to detect the Néel vector of an altermagnet, we investigate topological phases in a bilayer system composed of an altermagnet and a two-dimensional topological insulator described by the Bernevig-Hughes-Zhang model. A topological phase transition occurs from a first-order topological insulator to a trivial insulator at a certain critical altermagnetization if the Néel vector of altermagnet is along the $x$ axis or the $y$ axis. It is intriguing that valley-protected edge states emerg…

Texture tomography, a versatile framework to study crystalline texture in 3D
M. P. K. Frewein, J. K. Mason, B. Maier, H. C\"olfen, M. Burghammer, A. A. Medjahed, M. Allain, T. A. Gr\"unewald
https://arxiv.org/abs/2404.11195

Texture tomography, a versatile framework to study crystalline texture in 3D
The crystallographic texture is a key organization feature of many technical and biological materials. In these materials, especially hierarchically structured ones, the preferential alignment of the nano constituents is heavily influencing the macroscopic behaviour of the material. In order to study local crystallographic texture with both high spatial and angular resolution, we developed Texture tomography (TexTOM). This approach allows to model the diffraction data of polycrystalline materia…

This https://arxiv.org/abs/2404.12735 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Enumerating low-frequency nonphononic vibrations in computer glasses
In addition to Goldstone phonons that generically emerge in the low-frequency vibrational spectrum of any solid, crystalline or glassy, structural glasses also feature other low-frequency vibrational modes. The nature and statistical properties of these modes -- often termed `excess modes' -- have been the subject of decades-long investigation. Studying them, even using well-controlled computer glasses, has proven challenging due to strong spatial hybridization effects between phononic and nonp…

Electrically Switchable Circular Photogalvanic Effect in Methylammonium Lead Iodide Microcrystals
Yuqing Zhu, Ziyi Song, Rodrigo Becerra Silva, Bob Minyu Wang, Henry Clark Travaglini, Andrew C Grieder, Yuan Ping, Liang Z. Tan, Dong Yu
https://arxiv.org/abs/2403.15611

Electrically Switchable Circular Photogalvanic Effect in Methylammonium Lead Iodide Microcrystals
We investigate the circular photogalvanic effect (CPGE) in single-crystalline methylammonium lead iodide microcrystals under a static electric field. The external electric field can enhance the magnitude of the helicity dependent photocurrent (HDPC) by two orders of magnitude and flip its sign, which we attribute to magnetic shift currents induced by the Rashba-Edelstein effect. This HDPC induced by the static electric field may be viewed as an unusually strong third-order photoresponse, which …

Structural investigation of the liquid crystalline phases of three homologues from the series of 4-pentylphenyl-4'-n-alkyloxythiobenzoates (n = 9, 10, 11)
Aleksandra Deptuch, Bartosz S\k{e}k, Sebastian Lalik, Miros{\l}awa D. Ossowska-Chru\'sciel, Janusz Chru\'sciel, Monika Marzec
https://arxiv.org/abs/2403.08328

Structural investigation of the liquid crystalline phases of three homologues from the series of 4-pentylphenyl-4'-n-alkyloxythiobenzoates (n = 9, 10, 11)
Polarizing optical microscopy and differential scanning calorimetry are used to determine the phase sequence of three liquid crystalline 4-pentylphenyl-4'-n-alkyloxythiobenzoates with n = 9, 10, 11. The X-ray diffraction method is applied for structural characterization of the liquid crystalline phases. The smectic layer spacing, tilt angle, average distance between the long axes of molecules and correlation length of the short-range order are determined as a function of temperature. For the cr…

A survey of energies from pure metals to multi-principal element alloys
Ruitian Chen, Evelyn Li, Glenn D. Hibbard, Yu Zou
https://arxiv.org/abs/2402.17121 …

A survey of energies from pure metals to multi-principal element alloys
In materials science, a wide range of properties of materials are governed by various types of energies, including thermal, physicochemical, structural, and mechanical energies. In 2005, Dr. Frans Spaepen used crystalline face-centered-cubic (fcc) copper as an example to discuss a variety of phenomena that are associated with energies. Inspired by his pioneering work, we broaden our analysis to include a selection of representative pure metals with fcc, hexagonal close-packed (hcp), and body-ce…

Structural investigation of the liquid crystalline phases of three homologues from the series of 4-pentylphenyl-4'-n-alkyloxythiobenzoates (n = 9, 10, 11)
Aleksandra Deptuch, Bartosz S\k{e}k, Sebastian Lalik, Miros{\l}awa D. Ossowska-Chru\'sciel, Janusz Chru\'sciel, Monika Marzec
https://arxiv.org/abs/2403.08328

Structural investigation of the liquid crystalline phases of three homologues from the series of 4-pentylphenyl-4'-n-alkyloxythiobenzoates (n = 9, 10, 11)
Polarizing optical microscopy and differential scanning calorimetry are used to determine the phase sequence of three liquid crystalline 4-pentylphenyl-4'-n-alkyloxythiobenzoates with n = 9, 10, 11. The X-ray diffraction method is applied for structural characterization of the liquid crystalline phases. The smectic layer spacing, tilt angle, average distance between the long axes of molecules and correlation length of the short-range order are determined as a function of temperature. For the cr…

This https://arxiv.org/abs/2402.15056 has been replaced.
initial toot: https://mastoxiv.page/@a…

Effects of Misorientation on Single Crystal Plasticity by Finite Element Methods
The crystal plasticity finite element method (CPFEM) is a widely used technique for resolving macroscopic stress and strain onto the physically relevant length scales of grains and slip systems in ductile crystalline materials like structural metals. Here, the calibration of a CPFEM model for single crystal applications was found to depend critically on loading orientation, with an effect significant even at an angle of 0.1 degrees. Slight misorientation from high symmetry loading affected latt…

This https://arxiv.org/abs/2402.15056 has been replaced.
initial toot: https://mastoxiv.page/@a…

Effects of Misorientation on Single Crystal Plasticity by Finite Element Methods
The crystal plasticity finite element method (CPFEM) is a widely used technique for resolving macroscopic stress and strain onto the physically relevant length scales of grains and slip systems in ductile crystalline materials like structural metals. Here, the calibration of a CPFEM model for single crystal applications was found to depend critically on loading orientation, with an effect significant even at an angle of 0.1 degrees. Slight misorientation from high symmetry loading affected latt…

Universal stress correlations in crystalline and amorphous packings
Roshan Maharana, Debunker Das, Pinaki Chaudhuri, Kabir Ramola
https://arxiv.org/abs/2402.08738

Universal stress correlations in crystalline and amorphous packings
We present a universal characterization of stress correlations in athermal systems, across crystalline to amorphous packings. Via numerical analysis of static configurations of particles interacting through harmonic as well as Lennard-Jones potentials, for a variety of preparation protocols and ranges of microscopic disorder, we show that the properties of the stress correlations at large lengthscales are surprisingly universal across all situations, independent of structural correlations, or t…

Altermagnetism in NiSi with non-collinear spins
Deepak K. Singh, Sang-Wook Cheong, Jiasen Guo
https://arxiv.org/abs/2402.17451 https://

Altermagnetism in NiSi with non-collinear spins
Recently, a new class of magnetic phenomenon, called altermagnetism, was proposed where the underlying spin configuration resembles antiferromagnetic structure, but the system violates \textbf{PT} (PT: Parity times Time reversal) symmetry due to the alternation of crystalline symmetry across magnetic ions. Although the original idea was proposed for the collinear spin structure, a recent report by Cheong et al. has suggested that antiferromagnetic materials with non-collinear spin structure and…

Universal stress correlations in crystalline and amorphous packings
Roshan Maharana, Debunker Das, Pinaki Chaudhuri, Kabir Ramola
https://arxiv.org/abs/2402.08738

Universal stress correlations in crystalline and amorphous packings
We present a universal characterization of stress correlations in athermal systems, across crystalline to amorphous packings. Via numerical analysis of static configurations of particles interacting through harmonic as well as Lennard-Jones potentials, for a variety of preparation protocols and ranges of microscopic disorder, we show that the properties of the stress correlations at large lengthscales are surprisingly universal across all situations, independent of structural correlations, or t…

General theory for longitudinal nonreciprocal charge transport
Hong Jian Zhao, Lingling Tao, Yuhao Fu, Laurent Bellaiche, Yanming Ma
https://arxiv.org/abs/2404.10186

General theory for longitudinal nonreciprocal charge transport
The longitudinal nonreciprocal charge transport (NCT) in crystalline materials is a highly non-trivial phenomenon, motivating the design of next generation two-terminal rectification devices (e.g., semiconductor diodes beyond PN junctions). The practical application of such devices is built upon crystalline materials whose longitudinal NCT occurs at room temperature and under low magnetic field. However, materials of this type are rather rare and elusive, and theory guiding the discovery of the…

Beyond structural stabilization of highly-textured AlN thin film: the role of chemical effects
O. V. Pshyk (Empa - Swiss Federal Laboratories for Materials Science,Technology, D\"ubendorf, Switzerland), J. Patidar (Empa - Swiss Federal Laboratories for Materials Science,Technology, D\"ubendorf, Switzerland), S. Siol (Empa - Swiss Federal Laboratories for Materials Science,Technology, D\"ubendorf, Switzerland)

Beyond structural stabilization of highly-textured AlN thin film: the role of chemical effects
The crystalline quality and degree of c-axis orientation of hexagonal AlN thin films correlate directly with their functional properties. Therefore, achieving AlN thin films of high crystalline quality and texture is of extraordinary importance for many applications, but in particular in electronic devices. Here, we present a systematic study revealing that the growth of c-axis orientated AlN thin films can be governed by a chemical stabilization effect in addition to the conventionally known s…

Emergent Anti-Ferroelectric Ordering and the Coupling of Liquid Crystalline and Polar Order
Jordan Hobbs, Calum J. Gibb, Richard. J. Mandle
https://arxiv.org/abs/2404.12271

Emergent Anti-Ferroelectric Ordering and the Coupling of Liquid Crystalline and Polar Order
Polar liquid crystals possess three dimensional orientational order coupled with unidirectional electric polarity, yielding fluid ferroelectrics. Such polar phases are generated by rod-like molecules with large electric dipole moments. 2,5-Disubstituted 1,3-dioxane is commonly employed as a polar motif in said systems, and here we show this to suffer from thermal instability as a consequence of equatorial-trans to axial-trans isomerism at elevated temperatures. We utilise isosteric building blo…

Emergent Anti-Ferroelectric Ordering and the Coupling of Liquid Crystalline and Polar Order
Jordan Hobbs, Calum J. Gibb, Richard. J. Mandle
https://arxiv.org/abs/2404.12271

Emergent Anti-Ferroelectric Ordering and the Coupling of Liquid Crystalline and Polar Order
Polar liquid crystals possess three dimensional orientational order coupled with unidirectional electric polarity, yielding fluid ferroelectrics. Such polar phases are generated by rod-like molecules with large electric dipole moments. 2,5-Disubstituted 1,3-dioxane is commonly employed as a polar motif in said systems, and here we show this to suffer from thermal instability as a consequence of equatorial-trans to axial-trans isomerism at elevated temperatures. We utilise isosteric building blo…

This https://arxiv.org/abs/2212.01316 has been replaced.
link: https://scholar.google.com/scholar?q=a

Frank-Read Mechanism in Nematic Liquid Crystals
In a crystalline solid under mechanical stress, a Frank-Read source is a pinned dislocation segment that repeatedly bows and detaches, generating concentric dislocation loops. We demonstrate that in nematic liquid crystals, an analogous Frank-Read mechanism can generate concentric disclination loops. Using experiment, simulation, and theory, we study a disclination segment pinned between surface defects on one substrate in a nematic cell. Under applied twist of the nematic director, the pinned …

This https://arxiv.org/abs/2401.17531 has been replaced.
link: https://scholar.google.com/scholar?q=a

On-the-fly training of polynomial machine learning potentials in computing lattice thermal conductivity
The application of first-principles calculations for predicting lattice thermal conductivity (LTC) in crystalline materials, in conjunction with the linearized phonon Boltzmann equation, has gained increasing popularity. In this calculation, the determination of force constants through first-principles calculations is critical for accurate LTC predictions. For material exploration, performing first-principles LTC calculations in a high-throughput manner is now expected, although it requires sig…

Unified Differentiable Learning of the Electric Enthalpy and Dielectric Properties with Exact Physical Constraints
Stefano Falletta, Andrea Cepellotti, Chuin Wei Tan, Anders Johansson, Albert Musaelian, Cameron J. Owen, Boris Kozinsky
https://arxiv.org/abs/2403.17207

Unified Differentiable Learning of the Electric Enthalpy and Dielectric Properties with Exact Physical Constraints
The modern theory of polarization and electric enthalpy functionals have paved the way to first-principles studies of polarization in crystalline, disordered and liquid materials. However, calculating the polarization in large-scale ab-initio molecular dynamics remains prohibitive due to the high computational cost involved. In this work, we introduce a machine-learning formulation that simultaneously learns to predict electric enthalpy, atomic forces, polarization, Born charges, and polarizabi…

Simulating Crystallization in a Colloidal System Using State Predictive Information Bottleneck based Enhanced Sampling
Vanessa J. Meraz, Ziyue Zou, Pratyush Tiwary
https://arxiv.org/abs/2404.17722

Simulating Crystallization in a Colloidal System Using State Predictive Information Bottleneck based Enhanced Sampling
We investigate crystal nucleation in supersaturated colloid suspensions using enhanced molecular dynamics simulations augmented with machine learning techniques. The simulations reveal that crystallization in the model colloidal system studied here, with particles interacting through a repulsive screened Coulomb Yukawa potential, proceeds from vapor to dense liquid droplet to crystalline phases across multiple high barriers. Employing a one-dimensional reaction coordinate derived from the State…

Crystallization morphology and self-assembly of polyacrylamide solutions during evaporation
Jun Hu, Zhan-Long Wang
https://arxiv.org/abs/2403.20191 https:/…

Crystallization morphology and self-assembly of polyacrylamide solutions during evaporation
This study investigated crystallization and self-assembly phenomena in polyacrylamide (PAM) solutions during evaporation. As the solvent gradually evaporated, microscopic crystals began to form in the solution. The results show that concentration gradients form as the solution evaporates, leading to varied crystalline morphologies. From the edge to the center of the PAM solution, grass-like structures with intricate vein-like patterns and irregular morphologies were formed. The concentration gr…