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Асимметрия критического тока, индуцированного полем доменной стенки
Гл. 2. С. 7–8.
Силаев М. А., Аладышкин А. Ю., Silaeva M. V., Aladyshkina A. S.
In book
Т. 1. , Издательство Нижегородского государственного университета им. Н.И. Лобачевского, 2014.
Polkin A., Skvortsov M., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 113 No. 17 Article 174516
We develop a full microscopic theory for the optical conductivity 𝜎(𝜔) of a dirty current-carrying superconductor. Within the Keldysh sigma model formalism, we obtain the general analytical expression for 𝜎(𝜔), applicable for arbitrary frequency 𝜔, temperature 𝑇, and dc supercurrent 𝐼. In addition to altering the usual Mattis-Bardeen conductivity 𝜎1(𝜔), a finite supercurrent introduces two new contributions: 𝜎qp2(𝜔) from quasiparticle redistribution and 𝜎SH2(𝜔) from the amplitude ...
Added: June 25, 2026
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
Aladyshkin A. Y., Фраерман А. А., Н. Новгород: Национальный исследовательский Нижегородский государственный университет им. Н.И. Лобачевского, 2024.
В книге затронут широкий круг вопросов физики ограниченных твёрдых тел. Рассмотрено взаимодействие электромагнитного излучения рентгеновского диапазона, «тепловых» нейтронов и электронов с поверхностью твёрдого тела и многослойными структурами. Излагаются основы теории электронных состояний в полуограниченных твёрдых телах и применение метода туннельной спектроскопии для экспериментального изучения этих состояний. Возникновение поверхностной (прикраевой) сверхпроводимости на границах раздела рассматривается как ...
Added: February 1, 2024
Лакунов И. С., Егоров C. В., Муханова Е. Д. et al., Письма в Журнал экспериментальной и теоретической физики 2023 Т. 118 № 9 С. 656–663
Nonequilibrium phenomena in planar Josephson SNS nanostructures, where the superconductor (S) is Nb
and the normal metal (N) is Cu or Au, have been studied experimentally. Using additional N electrodes
attached to the S banks of the Josephson SNS junction, transport measurements have been performed at low
temperatures with the injection of quasiparticles with the use of local ...
Added: January 5, 2024
P. M. Marychev, Vodolazov D. Y., Physical Review B: Condensed Matter and Materials Physics 2022 Vol. 105 No. 9 Article 094522
We theoretically predict that the critical current Ic and magnetization M of a hybrid superconductor/normal-metal (SN) strip may have nonmonotonous dependence on a perpendicular magnetic field—so-called peak effect. In contrast to familiar peak effect, which is connected either with vortex entry to the superconductor or with peculiarities of vortex pinning, the found phenomenon exists at ...
Added: January 13, 2023
Bosboom V., Van der Vegt J. J., Kupriyanov M. Y. et al., Superconductor Science and Technology 2022 Vol. 34 No. 11 Article 115022
We develop a quantitative model describing the distribution of the supercurrent density and
density of states in SN-N-NS type Josephson junctions in three dimensions (S is a
superconductor and N is a normal metal). The model is based on the self-consistent solution of
the quasiclassical Usadel equations using the finite element method. We investigate the
influence of the proximity ...
Added: October 31, 2022
Vodolazov D. Y., Aladyshkin A. Y., Pestov E. E. et al., Superconductor Science and Technology 2018 Vol. 31 Article 115004
Developing the earlier results of Aslamazov et al ( 1986 Sov. Phys. JETP 64 1051 ) we perform a detailed study of the superconducting properties of a bilayer consisting of highly disordered superconducting (S) and low-resistive normal metal (N) films. We demonstrate theoretically and experimentally that the screening and transport properties of such a SN ...
Added: September 15, 2022
Галкина Е. Г., Иванов Б. А., Кулагин Н. Е. et al., 2021 Т. 159 № 4 С. 671–686
The motion of domain walls in chiral magnets with symmetry broken relative to spatial inversion is
investigated theoretically. It was found experimentally that such walls, which are known as the Dzyaloshinskii
domain walls [22], exhibit unique dynamic properties. For chiral ferromagnets and antiferromagnets, nonlinear regimes of the motion of such a wall with the velocity up to ...
Added: January 9, 2021
O. A. Sobolevskiy, JETP Letters 2018 Vol. 107 No. 2 P. 119–125
The vortex pinning and liquid-glass transition have been studied in BaFe2–xNixAs2 single crystals with different doping levels (x = 0.065, 0.093, 0.1, 0.14, 0.18). We found that Ni-doped Ba-122 has rather narrow vortex-liquid state region. Our results show that the temperature dependence of the resistivity as well as I−V characteristics of Ni-doped Ba-122 is consistent ...
Added: November 25, 2019
Vlasenko V., Pervakov K., Pudalov V. et al., Journal of Physics: Conference Series 2014 Vol. 507 No. 1 P. 022044-1–022044-4
We report on successful fabrication of superconducting FeSe wire using hot gas extrusion (HGE) ex-situ PIT (powder in tube) method. Length of the obtained wire was about 60cm with cross-sectional superconducting core area nearly 2.5x 10^-3 cm^2. For the wire sample we observed superconducting transition temperature, T_onset = 11 K, about 1.2K lower compared
to ...
Added: March 19, 2016
Pervakov K. S., Vlasenko V., Khlybov E. et al., Journal of Physics: Conference Series (IOP, UK) 2014 Vol. 507 No. 1 P. 012041-1–012041-4
We report on comparative study of magnetic phase diagram and critical current of the hole- and electron-doped BaFe2As2 single crystals with close values of superconducting critical temperature, Tc, (slightly underdoped Ba0.64K0.36Fe2As2 with Tc=25K and optimally doped BaFe1.9Ni0.1As2 with Tc=20K) obtained from measurements of the temperature dependence
of ac-susceptibility and isothermal irreversible magnetization loops, M(H), in magnetic ...
Added: March 19, 2016
Silaev M. A., Aladyshkin A. Y., Silaeva M V et al., Journal of Physics: Condensed Matter 2014 Vol. 26 No. 9 P. 095702-1–095702-7
On the basis of the phenomenological Ginzburg–Landau model we calculate the critical current of the domain-wall superconducting channel formed in flux-coupled superconductor/ferromagnet (S/F) hybrids in the presence of the nonuniform magnetic field of the domain walls. It is shown that the current-carrying ability in such S/F systems in the domain-wall superconducting state differs for the ...
Added: February 14, 2014
Aladyshkin A., Nefedov I., Aladyshkina A. S. et al., Physica C: Superconductivity and its Applications 2012 Vol. 479 P. 98–101
We investigate numerically the formation of vortex–antivortex pairs in thin-film superconducting strip in the presence of a straight current-carrying wire, oriented perpendicular to this strip. We demonstrate that the change in the number of the trapped vortices/antivortices inside the strip near the current-carrying wire results in a oscillatory dependence of the critical current Ic on ...
Added: November 19, 2012