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On the van-der-Waals forces
Mathematical notes. 2016. Vol. 99. No. 1. P. 284–289.
It is shown that, for the Lennard-Jones potential, there exist far-range van-der-Waals forces. It is claimed that such potentials occur rarely, just as potentials for the Schrödinger equation whose semiclassical solutions coincide with exact solutions.
Ивашенцева И. В., Каурова Н. С., Воронов Б. М. et al., St. Petersburg Polytechnical University Journal: Physics and Mathematics 2025 Vol. 18 No. 3.2 P. 129–133
This paper focuses on the study of reactive magnetron sputtering thin NbN films for sensitization of hot electron bolometers. HEB will be utilized in the Millimetron space observatory. The main principle of operation is a superconductivity that is experimentally observed when NbN film is cooled to the temperature of a liquid helium. At a critical ...
Added: December 24, 2025
A.S. Ilin, Strugova A. O., I.A. Cohn et al., PHYSICAL REVIEW MATERIALS 2024 Vol. 8 No. 7 Article 074801
Superconductivity has been found in RuN films obtained by reactive magnetron sputtering. This novel member of the metal nitride superconductors family has a critical temperature of the superconducting transition that varies depending on the substrate, ranging from 0.77 K to 1.29 K. The parameters of the crystal lattice of the superconducting films have been determined: ...
Added: February 25, 2025
Chertenkov V., Shchur L., Lecture Notes in Computer Science 2025 Vol. 15406 P. 434–449
Machine learning is a new tool for investigating physical models. One possible applications is the study of phase transitions analyzing the distribution of spins on regular lattices using supervised learning approach. A new question is the applicability of transfer learning, a network supervised on a particular model and used to infer information about another model.
The ...
Added: February 10, 2025
Arutyunov K., Sedov E., Zavyalov V. et al., Physics of Metals and Metallography, USA 2023 Vol. 124 No. 1 P. 53–57
The R(T) dependences of thin superconducting aluminum films deposited on leucosapphire and gallium arsenide substrates by electron beam sputtering and molecular beam epitaxy have been experimentally studied. Regardless of morphology, a noticeable increase in the critical temperature of the superconducting transition with a decrease in the film thickness is found. The effect is interpreted as a ...
Added: January 31, 2024
Diana Sukhoverhova, Chertenkov V., Burovskiy E. et al., Lecture Notes in Computer Science 2023 Vol. 14389 P. 314–329
We analyze the Ising model and the Baxter-Wu model in two dimensions using deep learning networks trained to classify paramagnetic (PM) and ferromagnetic (FM) phases. We use the usual Metropolis Monte Carlo algorithm to create uncorrelated snapshots of spin states. The images used as training data are labeled as belonging to the PM state or ...
Added: November 9, 2023
Ilin A., Стругова А. О., Кон И. А. et al., В кн.: Нанофизика и наноэлектроника. Труды XXVII Международного симпозиума (Нижний Новгород, 13–16 марта 2023 г.) в 2х томах. Том 1Т. 1: Секции 1, 2, 4, 6.: Н. Новгород: ИПФ РАН, 2023. С. 105–106.
Обнаружена сверхпроводимость в пленках RuN, полученных методом реактивного магнетронного распыления. Критическая температура сверхпроводящего перехода составляет от 0,77 до 1,29 К, в зависимости от подложки. Определены параметры кристаллической решетки сверхпроводящих пленок: решетка кубическая с параметрами a = b = c = 4.5586 Å, a = b = g = 87.96°. Результаты измерения температурных зависимостей второго критического магнитного ...
Added: March 26, 2023
Arutyunov K., Sedov E., Zavyalov V. et al., Физика металлов и металловедение 2023 Т. 124 № 1 С. 56–60
Экспериментально исследованы R(T) зависимости тонких сверхпроводящих пленок алюминия, изготовленных на подложках из лейкосапфира и арсенида галлия методом электронно-лучевого распыления и молекулярно-лучевой эпитаксии. Безотносительно к морфологии, был обнаружен заметный рост критической температуры сверхпроводящего перехода с уменьшением толщины пленки. Эффект интерпретируется как проявление квантового размерного эффекта. ...
Added: November 24, 2022
T. Karabassov, A.A. Golubov, Silkin V. M. et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 P. 224508-1–224508-9
Superconducting hybrid structures with topological order and induced magnetization offer a promising way to realize fault-tolerant quantum computation. However, the effect of the interplay between magnetization and the property of the topological insulator surface, otherwise known as spin-momentum locking on the superconducting proximity effect, still remains to be investigated. We relied on the quasiclassical self-consistent ...
Added: June 4, 2021
Koralov L., Molchanov S., Vainberg B., Applicable Analysis 2020
We consider a mean-field model of a polymer with a spherically symmetric finitely supported potential. We describe how the typical size of the polymer depends on the two parameters: the temperature, which approaches the critical value, and the length of the polymer chain, which goes to infinity. ...
Added: October 28, 2020
Nikolskiy V., Stegailov V., , in: Параллельные Вычислительные Технологии (ПАВТ'2018) Ростов-на-Дону, 02-06 апреля 2018 г.: Челябинск: Издательский центр ЮУрГУ, 2018. P. 139–152.
One of the most important problems for the creation of exaflops supercomputer is the reduction in the energy consumption of hardware. In this paper, the many-core processor architecture Epiphany is considered as a promising energy-efficient technology. The review of programming methods for new hardware is conducted, the development and debugging of the algorithm of classical ...
Added: October 30, 2019
Arutyunov K., Sedov E., Golokolenov I. et al., Физика твердого тела 2019 Т. 61 № 9 С. 1609–1613
Экспериментально исследовались высококачественные пленки алюминия на подложках из GaAs. Был обнаружен заметный рост критической температуры сверхпроводящего перехода с уменьшением толщины пленки. Эффект интерпретируется как проявление квантового размерного эффекта, влияющего как на плотность состояний электронов, так и на электрон-фононное взаимодействие. ...
Added: September 14, 2019
Arutyunov K., Sedov E., Golokolenov I. et al., Physics of the Solid State, Springer Nature Switzerland AG 2019 Vol. 61 No. 9 P. 1559–1562
High-quality aluminum films on GaAs substrates are studied experimentally. The critical temperature of superconductivity is found to increase markedly with decreasing the film thickness. The observed phenomenon is considered as a manifestation of the quantum confinement effect, which affects both the density of states and the electron–phonon interaction. ...
Added: September 14, 2019
Karabassov T., Stolyarov V. S., Golubov A. A. et al., Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 100 No. 10 P. 104502-1–104502-9
We investigate the behavior of the critical temperature T_c in superconductor/ferromagnet/superconductor (S/F/S) trilayers in the dirty limit as a function of the ferromagnetic layer thickness d_f and the S/F interface transparency. We perform T_c calculations using the general self-consistent multimode approach based on the Usadel equations in Matsubara Green’s functions technique, and compare the results ...
Added: September 5, 2019
Grigoryev F. I., Aleksandrova A., Gafurov V. A., Russian Microelectronics 2016 Vol. 45 No. 7 P. 469–473
The dependence of the thermal characteristics of TVS-diodes during the passage of the pulse overload has been studied. The time dependences of the pulse voltage limitation and current are analyzed. Based on the analysis of the dependences, the thermal characteristics of the TVS-diode are calculated. It is shown that the parameters of the TVS-diodes deteriorate ...
Added: April 14, 2017
Maslov V. P., Mathematical notes 2016 Vol. 100 No. 1 P. 154–185
The author constructs a new conception of thermodynamics which is based on new results in number theory. We consider a maximally wide range of gases, liquids, and fluids to which, in principle, the Carathéodory approach can be applied. The Carathéodory principle is studied using the Lennard-Jones potential as an example. On the basis of this ...
Added: October 10, 2016
Maslov V. P., Mathematical notes 2014 Vol. 95 No. 5 P. 3–18
In this paper, a new approach to the two-body problem is considered in greater detail than in previous papers of the author.
The semiclassical transition from quantum statistics to classical statistics is studied and an analog of superfluidity
in classical thermodynamics for supercritical states is obtained. ...
Added: December 21, 2014
Maslov V. P., Mathematical notes 2014 Vol. 95 No. 3 P. 399–406
Undistinguishing parastatistics of objectively distinguishable objects is considered. It describes clusters in the supercritical state. The relationship between the mesoscopic physics of clusters and the macroscopic thermodynamics of supercritical isotherms is established. We construct the supercritical pattern of isochores and isotherms under the assumption that the following three points: the Boyle temperature, the Boyle density, and the critical ...
Added: December 20, 2014
Maslov V. P., Russian Journal of Mathematical Physics 2014 Vol. 21 No. 2 P. 256–284
We consider the main ideas that led the author to the construction of the new
thermodynamics; this construction explains the Gibbs paradox and the new experimental effects of supercritical thermodynamics, as well as the law of preference of cluster formation before passage of gases to the liquid state. The law of invariance of the fractional number ...
Added: November 30, 2014
Maslov V., Теоретическая и математическая физика 2014 Т. 180 № 3 С. 394–432
We consider a parastatistics that does not distinguish objectively different objects but describes clusters in the supercritical state and determines the relation between the mesoscopic physics of clusters and the macroscopic thermodynamics of supercritical isotherms. We construct the supercritical picture of isochores and isotherms under the condition that the Boyle temperature, the Boyle density, and ...
Added: October 26, 2014
Maslov V. P., Russian Journal of Mathematical Physics 2014 Vol. 21 No. 1 P. 99–111
In the article, the relationship between the mesoscopic picture and the microscopic and macroscopic pictures is considered in the light of the work of V. E. Panin and his school. The coincidence of isochores and isotherms obtained by applying the undistinguishing statistics of objectively distinguishable objects with those of the Van-der-Waals model allows us to ...
Added: June 5, 2014
Maslov V. P., Mathematical notes 2014 Vol. 95 No. 1 P. 91–97
We consider various normalizations enabling us to change the scale of the graphs of isotherms and isochores. The relationship between parastatisticsal value of the maximal number of particles, corresponding to a given energy, and temperature allows us to pass in the domain of positive chemical potentials from the parastatisticsal number K (K = ∞ corresponds ...
Added: June 5, 2014