Journal of Experimental and Theoretical Physics最新文献_第4页

Asymptotic Theory of Solitons Generated from an Intense Wave Pulse 强波脉冲产生孤子的渐近理论

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110043

A. M. Kamchatnov

{"title":"Asymptotic Theory of Solitons Generated from an Intense Wave Pulse","authors":"A. M. Kamchatnov","doi":"10.1134/S1063776123110043","DOIUrl":"10.1134/S1063776123110043","url":null,"abstract":"A theory of conversion of an intense initial wave pulse into solitons for asymptotically long evolution times has been developed using the approach based on the fact that such a transformation occurs via an intermediate stage of formation and evolution of dispersion shock waves. The number of nonlinear oscillations in such waves turns out to be equal to the number of solitons in the asymptotic state. Using the Poincaré–Cartan integral invariant theory, it is shown that the number of oscillations equal to the classical action of a particle associated with the wave packet in the vicinity of the small-amplitude edge of a dispersion shock wave remains unchanged upon a transfer by a flow described by a nondispersive limit of the nonlinear wave equations considered here. This makes it possible to formulate a generalized Bohr–Sommerfeld quantization rule that determines the set of “eigenvalues” associated with soliton physical parameters in the asymptotic state (in particular, with their velocities). In the theory, the properties of full integrability of nonlinear wave equations are not used, but the corresponding results are reproduced in this case also. The analytical results are confirmed by numerical solutions to nonlinear wave equations.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139462257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Noise on Resistive Switching of an Yttria Stabilized Zirconia Based Memristor 噪声对基于钇稳定氧化锆的晶体管电阻开关的影响

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110031

O. N. Gorshkov, D. O. Filatov, M. N. Koriazhkina, V. A. Lobanova, M. A. Riabova

引用次数: 0

Phase Transitions in the Clock Model with q = 5 Spin States on a Triangular Lattice 三角形晶格上具有 q = 5 个自旋态的时钟模型中的相位转换

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110080

A. K. Murtazaev, M. K. Badiev, M. A. Magomedov, M. K. Ramazanov

引用次数: 0

Erratum to: Vortex Dynamics in Superconducting MoN Strip with a Side Cut 勘误：侧切超导氮化摩尔带中的涡旋动力学

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110171

S. S. Ustavschikov, M. Yu. Levichev, I. Yu. Pashen’kin, N. S. Gusev, S. A. Gusev, D. Yu. Vodolazov

引用次数: 0

Influence of the Effects of Competition of Various Types of Anisotropy on the Critical Behavior of Magnetic Multilayer Structures 各种类型的各向异性竞争对磁性多层结构临界行为的影响

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110158

A. V. Min’kova, V. V. Prudnikov, P. V. Prudnikov

{"title":"Influence of the Effects of Competition of Various Types of Anisotropy on the Critical Behavior of Magnetic Multilayer Structures","authors":"A. V. Min’kova, V. V. Prudnikov, P. V. Prudnikov","doi":"10.1134/S1063776123110158","DOIUrl":"10.1134/S1063776123110158","url":null,"abstract":"The influence of the competition of single-ion anisotropy and easy-plane anisotropy on the magnetic properties of the multilayer structure Co/Cu/Co is investigated. The peculiarities of the influence of anisotropy effects are revealed both in the vicinity of critical temperature Tc and in the low-temperature range T ( ll ) Tc. The magnetic properties of the multilayer structure are numerically simulated using the anisotropic Heisenberg model. In the vicinity of Tc, easy-plane anisotropy is shown to exert a predominant influence on the magnetic properties of the structure as compared to the influence of single-ion anisotropy. In the low-temperature range, the switching of the magnetic state of the ferromagnetic film in an external field leads to the appearance of specific features in hysteresis effects due to the competition of two types of magnetic anisotropy. The magnetic structure exhibits a size-induced transition from the behavior caused by easy-plane anisotropy to the behavior caused by single-ion anisotropy. The revealed size-induced transition is accompanied by a spin-flop effect.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139462256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spin Glass Model for GaAs/AlGaAs Quantum Wells Doped by Nonmagnetic Impurities near the Metal-Insulator Transition 金属-绝缘体转变附近非磁性杂质掺杂的砷化镓/砷化镓量子阱的自旋玻璃模型

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110018

N. V. Agrinskaya, V. I. Kozub

{"title":"Spin Glass Model for GaAs/AlGaAs Quantum Wells Doped by Nonmagnetic Impurities near the Metal-Insulator Transition","authors":"N. V. Agrinskaya, V. I. Kozub","doi":"10.1134/S1063776123110018","DOIUrl":"10.1134/S1063776123110018","url":null,"abstract":"In a previous report, we presented experiments which suggested that ferromagnetic ordering of the spins of localized holes in GaAs/AlGaAs quantum wells could be observed when doped with shallow (Be) acceptors at impurity concentrations near the metal-insulator transition. The compensating impurity (Si) was introduced into a narrow region at the center of the barriers [4]. In this paper, we present results from magnetotransport experiments performed on similar structures, but without the compensating impurity (Si). In these samples, the compensation degree is expected to be controlled by the background defects located at the edges of the quantum wells and within the barriers. At low temperatures T ≤ 10 K, we observed isotropic, linear magnetoresistance, anomalous behavior of the Hall effect as a function of the magnetic field, and slow relaxation of resistance after the application of a magnetic field. We explain this anomalous magnetotransport as the manifestation of a ferromagnetic transition or spin glass, originating from indirect spin exchange between localized holes on impurities near the metal-insulator transition. However, we note that perfect disorder, including signs of interspin interactions, leads to unstable configurations. In what follows, we present a model in which we start with this perfect disorder, but apply a procedure to obtain a stable configuration. We show that the resulting spin structure, a “closely packed” structure of “droplets,” can reproduce the features observed in the experiment, particularly isotropic, linear magnetoresistance.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139462225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lifshitz Transitions and Angular Conductivity Diagrams in Metals with Complex Fermi Surfaces 具有复杂费米面的金属中的利夫希茨转变和角传导图

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110079

A. Ya. Maltsev

{"title":"Lifshitz Transitions and Angular Conductivity Diagrams in Metals with Complex Fermi Surfaces","authors":"A. Ya. Maltsev","doi":"10.1134/S1063776123110079","DOIUrl":"10.1134/S1063776123110079","url":null,"abstract":"We consider the Lifshitz topological transitions and the corresponding changes in the galvano-magnetic properties of a metal from the point of view of the general classification of open electron trajectories arising on Fermi surfaces of arbitrary complexity in the presence of magnetic field. The construction of such a classification is the content of the Novikov problem and is based on the division of non-closed electron trajectories into topologically regular and chaotic trajectories. The description of stable topologically regular trajectories gives a basis for a complete classification of non-closed trajectories on arbitrary Fermi surfaces and is connected with special topological structures on these surfaces. Using this description, we describe here the distinctive features of possible changes in the picture of electron trajectories during the Lifshitz transitions, as well as changes in the conductivity behavior in the presence of a strong magnetic field. As it turns out, the use of such an approach makes it possible to describe not only the changes associated with stable electron trajectories, but also the most general changes of the conductivity diagram in strong magnetic fields.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139465276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ghost Imaging in a Fiber-Optic Endoscope Based on Light Scattering 基于光散射的光纤内窥镜鬼影成像技术

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110122

D. P. Agapov, I. V. Belovolov, S. A. Magnitskii, D. N. Frolovtsev, A. S. Chirkin

引用次数: 0

Hydraulic Jump for Planar and Axisymmetric Flow of a Fluid Layer 流体层平面和轴对称流动的水力跳动

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2024-01-12 DOI: 10.1134/S1063776123110110

A. D. Sukhov, A. G. Petrov

引用次数: 0

Spin Transfer Torque and Nonlinear Quantum Electron Transport in Chiral Helimagnets 手性螺旋磁体中的自旋传递扭矩和非线性量子电子传输

IF 1.1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2023-12-10 DOI: 10.1134/s1063776123100126

V. V. Ustinov, I. A. Yasyulevich

引用次数: 0