Tootfinder

Fe contribution to the magnetic anisotropy of $L{1_0}$-ordered FePt thin films studied by angle-dependent x-ray magnetic circular dichroism
Goro Shibata, Keisuke Ikeda, Takeshi Seki, Shoya Sakamoto, Yosuke Nonaka, Zhendong Chi, Yuxuan Wan, Masahiro Suzuki, Tsuneharu Koide, Hiroki Wadati, Koki Takanashi, Atsushi Fujimori
https://…

Fe contribution to the magnetic anisotropy of $L{1_0}$-ordered FePt thin films studied by angle-dependent x-ray magnetic circular dichroism
Among magnetic thin films with perpendicular magnetic anisotropy (PMA), $L1_0$-ordered FePt has attracted significant attention because of its exceptionally strong PMA. However, the microscopic origin of its strong PMA has not been elucidated experimentally. We have investigated the contribution of the Fe $3d$ electrons to its magnetic anisotropy energy by angle-dependent x-ray magnetic circular dichroism at the Fe $L_{2,3}$ edge. By this technique, one can deduce the magnetic dipole moment $m_…

Topotactic phase transformation in correlated vanadium dioxide through oxygen vacancy ordering
Xuanchi Zhou, Xiaohui Yao, Xiaomei Qiao, Jiahui Ji, Guowei Zhou, Huihui Ji, Xiaohong Xu
https://arxiv.org/abs/2506.23445

Topotactic phase transformation in correlated vanadium dioxide through oxygen vacancy ordering
Controlling the insulator-metal transition (IMT) in correlated oxide system through oxygen vacancy ordering opens up a new paradigm for exploring exotic structural transformation and physical functionality. Oxygen vacancy serves as a powerful tuning knob for adjusting the IMT property in VO2, though driving topochemical reduction to V2O3 remains challenging due to structural incompatibility and competing phase instability. Here we unveil consecutive oxygen-vacancy-driven VO2-VO2-x-V2O3 topotact…

A note on the strength of a hypercube
Melissa A. Huggan, M. E. Messinger, Dylan Pearson
https://arxiv.org/abs/2507.21908 https://arxiv.org/pdf/2507.21908…

A note on the strength of a hypercube
As a generalization of super magic strength, the strength of a graph was introduced in [R. Ichishima, F.A. Muntaner-Batle, A. Oshima, Bounds for the strength of graphs, Austral. J. of Combin. 72(3) (2018) 492-508]. For a vertex ordering $f$ of graph $G$, the strength of $f$ is the maximum sum of the labels on any pair of adjacent vertices. The strength of $G$ is defined as the minimum strength of $f$, taken over all vertex orderings of $G$. The strength of the hypercube is unknown, but bounded.…

This https://arxiv.org/abs/2209.01408 has been replaced.
link: https://scholar.google.com/scholar?q=a

Adequacy of nonsingular matrices over commutative principal ideal domains
The notion of the adequacy of commutative domains was introduced by Helmer in Bull. Amer.Math. Soc., 49 (1943), 225--236. In the present paper we extend the concept of adequacy to noncommutative Bézout rings. We show that the set of nonsingular second-order matrices over a commutative principal ideal domain is adequate.

Temporal Broadening of Attosecond Pulse Trains Induced by Multi-Band inference in Solid-State High-Order Harmonic Generation
Qing-Guo Fan, Kang Lai, Wen-hao Liu, Zhi Wang, Lin-Wang Wang, Jun-Wei Luo
https://arxiv.org/abs/2507.18019

Temporal Broadening of Attosecond Pulse Trains Induced by Multi-Band inference in Solid-State High-Order Harmonic Generation
The mechanism underlying high harmonic generation (HHG) in gases has been well clarified, characterizing attosecond pulse trains (APT) in the time domain, significantly advances the synthesis of isolated attosecond pulse (IAP). However, the complexity of HHG in solid obstacles IAP separation. Here, we use time-dependent density functional theory (TDDFT) to investigate the multiband mechanism of APT in solid state with bulk silicon as prototype. Our research unveils that: 1. The temporal charact…

Lawyers say Venezuelan migrant ordered returned to US sent to home country under prisoner exchange (Lea Skene/Associated Press)
https://apnews.com/article/cristian-venezuela-donald-trump-immigration-crackdown-a4d60581d19c6e24c8da4e907e8c73b7
http://www.memeorandum.com/250722/p119#a250722p119

Encoding molecular structures in quantum machine learning
Choy Boy, Edoardo Altamura, Dilhan Manawadu, Ivano Tavernelli, Stefano Mensa, David J. Wales
https://arxiv.org/abs/2507.20422

Encoding molecular structures in quantum machine learning
Quantum machine learning (QML) has great potential for the analysis of chemical datasets. However, conventional quantum data-encoding schemes, such as fingerprint encoding, are generally unfeasible for the accurate representation of chemical moieties in such datasets. In this contribution, we introduce the quantum molecular structure encoding (QMSE) scheme, which encodes the molecular bond orders and interatomic couplings expressed as a hybrid Coulomb-adjacency matrix, directly as one- and two-…

Gaussian Invariant Markov Chain Monte Carlo
Michalis K. Titsias, Angelos Alexopoulos, Siran Liu, Petros Dellaportas
https://arxiv.org/abs/2506.21511 https:…

Gaussian Invariant Markov Chain Monte Carlo
We develop sampling methods, which consist of Gaussian invariant versions of random walk Metropolis (RWM), Metropolis adjusted Langevin algorithm (MALA) and second order Hessian or Manifold MALA. Unlike standard RWM and MALA we show that Gaussian invariant sampling can lead to ergodic estimators with improved statistical efficiency. This is due to a remarkable property of Gaussian invariance that allows us to obtain exact analytical solutions to the Poisson equation for Gaussian targets. These …

Effect of Berry connection on attosecond transient absorption spectroscopy in gapped graphene
Jiayu Yan, Hongxuan Er, Wei Dang, Jiahuan Ren, Chao Chen, Dianxiang Ren, Fulong Dong
https://arxiv.org/abs/2506.19286

Effect of Berry connection on attosecond transient absorption spectroscopy in gapped graphene
We investigated the attosecond transient absorption spectroscopy (ATAS) in gapped graphene by numerically solving the four-band density-matrix equations. Our results reveal that, in contrast to graphene whose fishbone-shaped spectra primarily oscillates at twice the frequency of the pump laser, the ATAS of gapped graphene exhibits a first-order harmonic component induced by the Berry connection. To gain insight into this interesting results, we employ a simplified model that considers only the …

Intertwining local (adjacency) metric dimension with the clique number of a graph
Ali Ghalavand, Sandi Klav\v{z}ar, Xueliang Li
https://arxiv.org/abs/2507.13777

Intertwining local (adjacency) metric dimension with the clique number of a graph
Let $G$ be a simple connected graph with order $ n(G)$, local metric dimension $ {\rm dim}_l(G)$, local adjacency metric dimension $ {\rm dim}_{A,l}(G)$, and clique number $ ω(G)$, where $G\not\cong K_{n(G)}$ and $ω(G)\geq3$. It is proved that $ {\rm dim}_{A,l}(G) \leq \left\lfloor \left(\frac{ω(G) - 2}{ω(G) - 1}\right)n(G)\right\rfloor$. Consequently, the conjecture asserting that the latter expression is an upper bound for ${\rm dim}_l(G)$ is confirmed. It is important to note that there …