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Effects of anisotropy on the high-field magnetoresistance of Weyl semimetals
Physical Review B: Condensed Matter and Materials Physics. 2023. Vol. 108. No. 16. Article 165125.
We study the effects of anisotropy on the magnetoresistance of Weyl semimetals in the ultraquantum regime.
We utilize the fact that many Weyl semimetals are approximately axially anisotropic. We find that anisotropy
manifests itself in the strong dependence of the magnetoresistance on the polar and azimuthal angles determining
the orientation of the anisotropy axis with respect to the applied magnetic field and electric current. We also
predict that the ratio of magnetoresistances in the geometries, where the magnetic field and anisotropy axes
are aligned and where they are orthogonal, scales as (v⊥/v|| )2 where v⊥ and v|| are the corresponding Fermi
velocities.
Dmitriev A., Kornilov V., Batienkov R., Lecture Notes in Civil Engineering 2026 Vol. 886 P. 249–255
Numerous studies have provided compelling evidence that the probability distribution of avalanche sizes follows a power law, and that 1/f noise is present in the stochastic dynamics of landslides. We present a theoretical explanation of these phenomena within the framework of self-organized criticality theory, proposing a discrete-time model in the form of a sandpile cellular ...
Added: October 13, 2026
Dmitriev A., Shulman I., Lebedev A., Studies in Computational Intelligence 2026 Vol. 1265 P. 266–273
A discrete-time model is presented for the self-organization of the X/Twitter social network to the edge of a phase transition, characterized by avalanche-like propagation of information in the network. The model is based on the analogy between the critical dynamics of the X social network and sandpile cellular automata with Manna rule on the Chung-Lu ...
Added: October 13, 2026
Arutyunov K., Kharitonov I. A., Petrosyants K. O., JETP Letters 2026 Vol. 124 No. 6 P. 1–16
Superconducting properties of metallic micro- and nanowires can be entirely different from those of bulk superconductors. Of particular interest is the nonequilibrium current-induced state of a quasi-one-dimensional superconducting channel. The most interesting phenomenon here is the stepped I–V characteristic, explained by a process known as phase slip center activation. If the origin of such step-like ...
Added: October 13, 2026
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Махлуф М., Ozhegov R., Elezov M. et al., Фотоника 2026 Vol. 20 No. 6 P. 414–423
This paper compares the ranging precision of direct time-of-flight (dToF) and non-line-of-sight (NLOS) LiDAR architectures, both using a superconducting nanowire single-photon detector (SNSPD). Both systems operate at 1550 nm with a 50 ps pulsed laser and time-correlated single-photon counting (TCSPC). The dToF configuration achieved approximately 100 µm precision at 10 m, while the NLOS configuration achieved 500 µm precision for ...
Added: October 12, 2026
Sukhoverkhova D., Shchur L., , in: Proceedings of the 34th IUPAP Conference on Computational Physics: CCP2023, August 4-8, Kobe, Japan.: Singapore: Springer, 2026. Ch. 17 P. 145–155.
We analyze the Ising model with anisotropic interactions in two dimensions using deep learning neural networks (NN) trained to classify paramagnetic (PM) and ferromagnetic (FM) phases. The spin configurations used as training data are labeled as belonging to either PM state or the FM state using analytically known phase transition temperatures. We use the variation of the output function to ...
Added: October 12, 2026
Singapore: Springer, 2026.
This volume presents the Proceedings of the 34th IUPAP Conference on Computational Physics (CCP2023), held in Kobe, Japan on August 4–8, 2023. It offers a collection of peer-reviewed articles that highlight recent developments in computational and simulation research across various areas of physics. Key topics include the use of data science, quantum computing, and machine ...
Added: October 12, 2026
Goncharov A., Chibisov A., Advanced Theory and Simulations 2023 Vol. 12 No. 13 Article 2200816
Designing stable quantum computers with the ability to correct errors responsibly requires a detailed understanding of the physical processes that underlie these devices. In this study, detailed quantum mechanical simulations of the atomic structure, charge distribution of electron density, and distribution and orientation of magnetic and quantum states as a function of applied external pressure ...
Added: October 11, 2026
Chibisov A., Gnidenko A., Chibisova M. et al., FlatChem 2023 Vol. 41 Article 100533
Manufacturing precise quantum computers with small errors in quantum operations, long coherence times, and low power consumption is the most important challenge in modern nanoelectronics. To understand the operating modes of such calculators in detail, both the optimal arrangement of the qubit system within the structure and changes in its magnetic properties must be comprehensively ...
Added: October 11, 2026
Denis K., Kalentyeva I. L., Vikhrova O. V. et al., Journal of Magnetism and Magnetic Materials 2022 Vol. 556 Article 169360
We have investigated the layers of the (Ga,Mn)As diluted magnetic semiconductor with the thickness in the range of 150 – 400 nm, which have been formed by the combination of the methods of a pulsed laser deposition and a post-growth pulsed laser annealing. It has been found that the laser annealing has a significant effect on the structural, ...
Added: September 6, 2026
Grigoriev P., Pavlov N., Nekrasov I. et al., Communications Materials, A Nature Portfolio journal (United Kingdom) ISSN 26624443 2025 Vol. 6 No. 1 Article 252
Layered van der Waals crystals of topologically non-trivial and trivial semimetals with antiferromagnetic (AFM) ordering of magnetic sublattice are known to exhibit a negative magnetoresistance that is well correlated with AFM magnetization changes in a magnetic field. This effect is reported in several experimental studies with EuFe2As2, EuSn2As2, EuSn2P2, etc., where the resistance decreases quadratically with field by about ...
Added: January 24, 2026
A. I. Lomakin, E. M. Baeva, Titova N. A. et al., Applied Physics Letters 2025 Vol. 127 No. 17 Article 173501
We investigate electron transport and phase-breaking processes in thin titanium nitride (TiN) films of epitaxial quality. Previous studies show that a minute surface magnetic disorder significantly reduces the critical temperature (Tc) and broadens the superconducting transition as the film thickness and device size decrease. We measure electron dephasing rates via magnetoresistance from Tc to ~4Tc ...
Added: October 28, 2025
Shalygin V. A., Makhov I., Adamov R. B. et al., Journal of Applied Physics 2024 Vol. 136 No. 19 Article 195703
Near-infrared photoluminescence spectra of the n-doped gallium arsenide epilayer under heating lateral electric field conditions are studied. The field dependences of hot electron and hole temperatures are determined from photoluminescence spectra and from solving the power balance equation using current–voltage characteristic. Polarization anisotropy of the photoluminescence radiation arising due to the anisotropy of hot electron distribution ...
Added: November 23, 2024
Influence of anisotropy on the study of critical behavior of spin models by machine learning methods
Sukhoverkhova D., Shchur L., / Series arXiv "math". 2024. No. 2410.14523.
In this paper, we applied a deep neural network to study the issue of knowledge transferability between statistical mechanics models. The following computer experiment was conducted. A convolutional neural network was trained to solve the problem of binary classification of snapshots of the Ising model's spin configuration on a two-dimensional lattice. During testing, snapshots of ...
Added: October 21, 2024
Sukhoverkhova D., Shchur L., Письма в Журнал экспериментальной и теоретической физики 2024 Т. 120 № 8 С. 644–649
In this paper, we applied a deep neural network to study the issue of knowledge transferability between statistical mechanics models. The following computer experiment was conducted. A convolutional neural network was trained to solve the problem of binary classification of snapshots of snapshots of the location of spins of the Ising model on a two-dimensional ...
Added: September 25, 2024
A. I. Lomakin, E. M. Baeva, Titova Nadezhda A. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2022 Vol. 15 No. 3.3 P. 64–69
В данной работе мы представляем результаты экспериментального
исследования времени сбоя фазы волновой функции электрона в ультратонких
сверхпроводящих плeнках ниобия (Nb). В Nb пленках, пассированных слоем кремния
(Si), наблюдается сильная зависимость времени сбоя фазы от температуры τϕ ~ Т^(-2.5),
вероятно, обусловленная электрон-фононным рассеянием. Однако в непокрытых
кремнием Nb пленках наблюдается насыщение времени сбоя фазы при низких
температурах, что может быть обусловлено наличием ...
Added: September 12, 2023
A. I. Lomakin, E. M. Baeva, Triznova A. D. et al., Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 107 No. 5 Article 054205
We report on experimental study of the effect of disorder on electronic parameters and inelastic scattering mechanisms in ultrathin superconducting NbN films, which are commonly used in single-photon detectors. An increase in disorder in the studied 2.5-nm-thick NbN films characterized by Ioffe-Regel parameter from 6.3 to 1.6 is accompanied by a decrease in the critical ...
Added: August 9, 2023
Ya. I. Rodionov, K. I. Kugel, Aronzon B. A., Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 107 No. 15 Article 155120
We study the effects of strong Coulomb disorder on the transverse magnetoresistance in Weyl semimetals at low temperatures. Using the diagrammatic technique and the Keldysh model to sum up the leading terms in the diagrammatic expansion, we find that the linear magnetoresistance exhibits a strong renormalization due to the long-range nature of the Coulomb interaction ρ_xx ∝ Hln(eHℏv^2/cT^2_imp), ...
Added: May 3, 2023
V. V. Demidov, Applied Magnetic Resonance 2021 Vol. 52 No. 7 P. 797–803
The presented work shows the reality of recording anisotropic magnetoresistance signal in thin ferromagnetic films with uniaxial in-plane magnetic anisotropy under pseudoresonance conditions. Experimental data and calculations based on the Landau–Lifshitz–Hilbert equation demonstrate the ability of this technique to switch the signal sign by imposing an external constant magnetic field of ~ 1 Oe. ...
Added: December 10, 2022
Sluchanko N., Azarevich A., Demishev S. V. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 No. 3 Article 035117
A comprehensive study of magnetoresistance and Hall effect has been performed for the set of the single crystals of nonmagnetic metal LuB12 with the Jahn-Teller instability of the boron cage and dynamic charge stripes forming along ⟨110⟩ direction. An anomalous positive contribution to Hall effect for a particular direction of magnetic field H//[001] is found in the single crystals of LuB12 of the ...
Added: October 25, 2022
V. V. Tyutin, JETP Letters 2022 Vol. 115 No. 10 P. 634–637
An extended vector envelope soliton with significantly different frequencies of the polarization components is found. Coupled nonlinear Schrödinger equations, which include the difference in the response of an anisotropic medium to wave fields of different polarizations and different frequencies, are used as a model. The vector soliton differs from the well-known Manakov soliton in the ...
Added: August 13, 2022
Kuntsevich A., Нунупаров М. С., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 93 No. 20
By measuring magnetoresistance and the Hall effect in a classically moderate perpendicular magnetic field in a Si-MOSFET-type macroscopic antidot array, we found a nonlinear with field, temperature- and density-dependent Hall resistivity. We argue that this nonlinearity originates from low mobility shells of the antidots with a strong temperature dependence of the resistivity and suggest a ...
Added: June 17, 2022
Tyutin V. V., Письма в Журнал экспериментальной и теоретической физики 2022 Т. 115 № 10 С. 666–669
Найден протяженный векторный солитон огибающей при существенном различии частот поляризационных компонент. В качестве модельного использовано связанное нелинейное уравнение Шредингера, учитывающее различие реакции анизотропной среды на волновые поля разных поляризаций и разных частот. Найденный векторный солитон отличается от хорошо известного солитона Манакова соотношением волновых чисел и частот поляризационных компонент. Но при отсутствии различия реакции анизотропной среды на волновые поля ...
Added: May 26, 2022