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СВЧ импеданс тонкоплёночных гибридных структур сверхпроводник – нормальный металл с большим отношением проводимостей
Физика твердого тела. 2019. Т. 61. С. 1722-1728.
Уставщиков С. С., Aladyshkin A. Y., Курин В. В., Маркелов В. А., Елькина А. И., Клушин А. М., Юнин П. А., Рогов В. В., Водолазов Д. Ю.
Камашев А. А., Гарифьянов Н. Н., Валидов А. А. et al., Физика твердого тела 2022 Т. 64 № 9 С. 1201-1210
Проведен анализ транспортных свойств двух типов спиновых клапанов, в которых в качестве одного из двух ферромагнитных слоев в структурах Ф1/Ф2/C использовался сплав Гейслера Co_{2}Cr_{1−x}Fe_{x}Al_{y}. Слой сплава Гейслера был использован: 1) в качестве слабого ферромагнетика, в случае Ф2-слоя; 2) в качестве полуметалла, в случае Ф1-слоя. В первом случае, был получен большой классический эффект сверхпроводящего спинового клапана ...
Added: October 31, 2022
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
Селезнёв Д. В., Yagovtsev V., Pugach N. et al., Физика металлов и металловедение 2023 Т. 124 № 2 С. 196-203
The magnetization induced in a superconductor due to the reverse proximity effect is studied in hybrid structures containing a superconductor and a ferromagnetic insulator. The study was carried out within the method of semiclassical Green’s functions, in which the Usadel equations are solved numerically with boundary conditions suitable for strongly spin-polarized ferromagnetic materials. The conversion ...
Added: November 17, 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
Karabassov T., Vasenko A., Известия Уфимского научного центра РАН 2021 Т. 1 С. 10-16
Materials that possess strong spin-orbit interaction have provoked great interest over the past few years, in
particular, in the actively developing field of quantum calculations. A topological insulator is a good example of
such a material. The topological insulator has high surface conductivity, whereas in the body it shows the properties
of an insulator, this being a purely ...
Added: December 30, 2020
Mazanik A. A., Fominov Ya.V., Annals of Physics 2023 Vol. 449 Article 169199
We study the density of states (DoS) $\nu(E)$ in a normal-metallic (N) film contacted by a bulk superconductor (S). We assume that the system is diffusive and the SN interface is transparent. In the limit of thin N layer (compared to the coherence length), we analytically find three different types of the DoS peculiarity at ...
Added: December 27, 2022
Golikova T. E., Wolf M. J., Beckmann D. et al., Superconductor Science and Technology 2021 Vol. 34 No. 9 Article 095001
A nonmonotonic dependence of the critical Josephson supercurrent on the injection current
through a normal metal/ferromagnet weak link from a single domain ferromagnetic strip has
been observed experimentally in nanofabricated planar crosslike S-N/F-S Josephson structures.
This behavior is explained by 0–π and π–0 transitions, which can be caused by the suppression
and Zeeman splitting of the induced superconductivity due ...
Added: June 7, 2021
Brems X., Muhlbauer S., Córdoba C. W. et al., Superconductor Science and Technology 2022 Vol. 35 No. 3 Article 035003
Small-angle neutron scattering is used in combination with transport measurements to
investigate the current-induced effects on the morphology of the intermediate mixed state (IMS)
domains in the intertype superconductor niobium. We report the robust self-organisation of the
vortex lattice domains to elongated parallel stripes perpendicular to the applied current in a
steady-state. The experimental results for the formation of ...
Added: January 30, 2022
Andrew G. Semenov, Zaikin A., Physical Review B: Condensed Matter and Materials Physics 2015 Vol. 91 No. 2 P. 024505-1-024505-10
We demonstrate that in sufficiently long diffusive superconducting-normal-superconducting (SNS) junctions dc Josephson current is exponentially suppressed by electron-electron interactions down to zero temperature. This suppression is caused by the effect of Cooper pair dephasing which occurs in the normal metal and defines a new fundamental length scale Lφ in the problem. This length is fully consistent with that derived ...
Added: March 11, 2015
Arutyunov K., Lehtinen J., Physical Review Letters 2022 Vol. 128 Article 159702
Comment LEK1147 on ``Coulomb blockade and Bloch oscillations in superconducting Ti
nanowires'' by E. V. Il'ichev, V. V. Ryazanov, and O. V. Astafiev ...
Added: November 24, 2022
Трифонов А. В., Аверьев Н. В., Чараев И. А. et al., Труды МФТИ, Россия, Москва 2014 Т. 6 № 1 С. 20
Работа посвящена сравнению с экспериментом модели термически активированных одиночных вихрей, описывающей темновой счет сверхпроводникового однофотонно- го детектора. Получено, что модель достаточно хорошо описывает зависимость числа темновых отсчетов в единицу времени от тока смещения, если последний достаточно близок к критическому току (𝐼𝑏 ≥ 0.9𝐼𝑐). ...
Added: March 16, 2015
Эминов П. А., Сезонов Ю. И., Гордеева С. В., Физика твердого тела 2014 Т. 56 № 3 С. 423-430
Проведено численное и аналитическое исследование термодинамических свойств сверхпроводящего намагниченного квантового цилиндра. Изучена зависимость разности намагниченностей сверхпроводящей и нормальной фаз от параметров нанотрубки, температуры и магнитного поля. Вычислен скачок теплоемкости сверхпроводящего и нормального состояний при критической температуре. Исследован флуктуационный вклад в термодинамические свойства нанотрубки при температуре выше точки перехода. ...
Added: March 1, 2015
Саратов : Саратовский государственный технический университет, 2012
В докладах научно-технической конференции нашли отражение результаты теоретических и экспериментальных исследований в области электродинамики и микроволновой техники, наноэлектроники, силовой электроники, полупроводниковой электроники, электроэнергетики, систем измерительной и медицинской техники.
Излагаются результаты исследования резонаторных и замедляющих систем, устройств СВЧ, приборов вакуумной, плазменной и микроэлектроники, технологические вопросы изготовления изделий электронной техники.
Сборник включает в себя три раздела: микроволновая электроника, вакуумная ...
Added: September 30, 2012
A. G. Semenov, A. D. Zaikin, Physics-Uspekhi 2022 Vol. 65 No. 9 P. 883-919
We review some recent developments in the field of quasi-one-dimensional superconductivity. We demonstrate that low temperature properties of superconducting nanowires are essentially determined by quantum fluctuations. Smooth (Gaussian) fluctuations of the superconducting phase (also associated with plasma modes propagating along a wire) may significantly affect the electron density of states in such nanowires and induce ...
Added: January 29, 2023
Kuzovnikov M., Antonov Vladimir E., Kulakov V. et al., PHYSICAL REVIEW MATERIALS 2023 Vol. 7 No. 2 Article 024803
Zirconium trihydride and, for comparison, trideuteride with hexagonal close-packed (hcp) metal lattices
were synthesized at a hydrogen/deuterium pressure of 9 GPa and a temperature of 873 K using toroid-type
high-pressure chambers. After a rapid cooling (quenching) to 100 K and lowering the pressure to atmospheric,
the quenched sample was removed from the chamber and studied by hot extraction ...
Added: February 13, 2024
Palnichenko A. V., Mazilkin A. A., Rybchenko O. et al., Physica C: Superconductivity and its Applications 2020 Vol. 571 Article 1353608
Metastable superconducting-like behavior of rhombohedral Bi samples exposed to surface oxidation under special conditions has been observed below the critical temperature range of 15–35 K. The ac magnetic susceptibility and electrical resistance measurements imply that the superconductivity appears in the Bi/Bi2O3 interfacial layer formed at the surface of the samples. ...
Added: October 26, 2022
Andrew G. Semenov, Zaikin A., Physical Review B: Condensed Matter and Materials Physics 2013 Vol. 88 No. 5 P. 054505-1-054505-10
We investigate the effect of interacting quantum phase slips on persistent current and its fluctuations in ultrathin superconducting nanowires and nanorings pierced by the external magnetic flux. We derive the effective action for these systems and map the original problem onto an effective sine-Gordon theory on torus. We evaluate both the flux dependent persistent current ...
Added: February 9, 2015
K. I. Kugel, Bianconi A., Poccia N. et al., Superconductor Science and Technology 2015 Vol. 28 No. 2 P. 024005-1-024005-8
The arrested nanoscale phase separation in a two-band Hubbard model for strongly correlated charge carriers is shown to occur in a particular range in the vicinity of the topological Lifshitz transition, where the Fermi energy crosses the bottom of the narrow band and a new sheet of the Fermi surface related to the charge carriers ...
Added: March 12, 2016
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
Korneeva Y., Золотов Ф. И., Korneev A., Superconductor Science and Technology 2021 P. 1-10
We report our study of detection efficiency (DE) saturation in wavelength range 400 - 1550 nm for the NbN Superconducting Microstrip Single-Photon Detectors (SMSPD) featuring the strip width up to 3 μm. We observe an expected decrease of the $DE$ saturation plateau with the increase of photon wavelength and decrease of film sheet resistance. At ...
Added: June 9, 2021
Анфертьев В. А., Вакс В. Л., Пентин И. В. et al., Вестник Нижегородского университета им. Н.И. Лобачевского 2014 № 1-2 С. 126-131
A possibility to develop a high-resolution terahertz (THz) spectrometer for a wide range of tasks is considered. The proposed spectrometer consists of a synthesizer based on a Gunn generator and a frequency multiplier based on a semiconductor superlattice as a radiation source, as well as a NbN hot-electron bolometer in a direct-detection mode as a ...
Added: February 24, 2016
Karabassov T., [б.и.], 2020
В сборник помещены тезисы докладов участников XI Международной школы-конференции студентов, аспирантов и молодых ученых «Фундаментальная математика и ее приложения в естествознании»: спутник Международной научной конференции «Уфимская осенняя математическая школа-2020». Тезисы докладов воспроизводятся с представленных авторами оригиналов ...
Added: December 30, 2020
Andriyakhina E. S., Burmistrov I., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 103 Article 174519
Superconductor-ferromagnet heterostructures hosting vortices and skyrmions are a new area of the interplay between superconductivity and magnetism. We study the interaction of a Néel-type skyrmion and a Pearl vortex in thin heterostructures due to stray fields. Surprisingly, we find that it can be energetically favorable for the Pearl vortex to be situated at some nonzero ...
Added: October 11, 2021
Vagov A., Tiago T. Saraiva, Arkady A. Shanenko et al., Communications Physics 2023 Vol. 6 Article 284
In many pnictides the superconductivity coexists with ferromagnetism in an accessible range of temperatures and compositions. Recent experiments revealed that when the temperature of magnetic ordering Tm is below the superconducting transition temperature Tc, highly non-trivial physical phenomena occur. In this work we demonstrate the existence of a temperature window, situated between Tm and Tc, where these intrinsically type-II superconductors are ...
Added: October 18, 2023