?
Термодинамические свойства сверхпроводящего квантового цилиндра и их флуктуации
Физика твердого тела. 2014. Т. 56. № 3. С. 423-430.
Эминов П. А., Сезонов Ю. И., Гордеева С. В.
Eminov P. A., Ul’din A., Sezonov Y. I. et al., Russian Journal of Mathematical Physics 2010 Vol. 17 No. 2 P. 154-158
The thermodynamical potential of a superconducting quantum cylinder is calculated. The dependence of the critical temperature and the heat capacity of a superconducting system of the surface concentration of electrons and on the radius of the nanotube is studied. ...
Added: April 12, 2012
Eminov P. A., Sezonov Y. I., Gordeeva S., Diamond and Related Materials 2014 Vol. 49 P. 72-76
Analysis of the contribution of electron scattering on phonons, longitudinal and flexural resistance in the nanotube in a longitudinal magnetic field has been carried out quantitatively. The dependence of the conductance of the nanostructure on the nanotube radius, surface electron density, temperature, and Aharonov–Bohm parameter in the case of an isotropic phonon spectrum and taking ...
Added: November 23, 2014
Eminov P. A., Gordeeva S., Доклады Академии наук 2013 Т. 58 № 6 С. 236-239
В работе впервые исследован флуктуационный вклад в термодинамические свойства сверхпроводящего квантового цилиндра в окрестности и выше точки перехода. Получены аналитические формулы, описывающие зависимость полученных результатов от характерных параметров нанотрубки и напряженности продольного магнитного поля. Показано, что роль флуктуаций становится существенной вблизи точки перехода. ...
Added: September 11, 2013
Pudalov V.M., Gerasimenko Y. A., Sanduleanu S. V. et al., Physical Review B: Condensed Matter and Materials Physics 2014 Vol. 89 No. 5 P. 054518-1-054518-10
We report comprehensive (magneto)transport studies of the two-phase state in (TMTSF)2ClO4, where
superconducting (SC) phase coexists with spin-density wave insulator (SDW). By tuning the degree of ClO4
anion ordering in controlled manner we smoothly suppress the SDWstate and study resulting evolution of the SC
phase spatial texture.We find that as SDWis suppressed, SC regions initially appear inside the ...
Added: March 14, 2016
Ozhegov R., Горшков К. В., Окунев О. В. et al., Письма в Журнал технической физики 2010 Т. 36 № 21 С. 70-77
Исследована возможность использования матрицы чувствительных элементов на гиперполусферической линзе диаметром 12 mm в тепловизоре терагерцевого диапазона частот. Получены размеры области на линзе, приемлемой для расположения матрицы, в которой шумовая температура приемника меняется в пределах 16% от средней. Диаметр этой области составил 3.3% диаметра линзы. Получены отклонения основного лепестка диаграммы направленности, которые составили ±1.25o от направления ...
Added: October 12, 2017
Eminov P. A., Ul’din A., Sezonov Y. I., Физика твердого тела 2011 Т. 53 № 8 С. 1621-1627
Исследован вклад электрон-фононного рассеяния в электропроводность квантового цилиндра в продольном магнитном поле. Показано, что проводимость нанотрубки испытывает осцилляции Ааронова-Бома при изменении магнитного потока через сечение нанотрубки. В аналитическом виде получены формулы, описывающие температурную зависимость сопротивления наноструктуры как в случае изотропного фононного спектра, так и с учетом эффектов размерного ограничения фононов. ...
Added: April 12, 2012
O. O. Shvetsov, Esin V. D., Barash Y. S. et al., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 101 No. 3 P. 035304-1-035304-6
We experimentally study lateral electron transport between two 5−μm-spaced superconducting indium leads on a top of magnetic Weyl semimetal Co3Sn2S2. For the disordered magnetic state of Co3Sn2S2 crystal, we observe only the Andreev reflection in the proximity of each of the leads, which is indicative of highly transparent In-Co3Sn2S2 interfaces. If the sample is homogeneously magnetized, it demonstrates a well-developed ...
Added: December 1, 2020
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
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
Andrew G. Semenov, Zaikin A., Kuzmin L., Physical Review B: Condensed Matter and Materials Physics 2012 Vol. 86 No. 14 P. 144529-1-144529-5
We argue that electron-electron interactions fundamentally restrict the penetration length of Cooper pairs into a diffusive normal metal from a superconductor. At low temperatures, this Cooper pair dephasing length remains finite and does not diverge. We evaluate the subgap conductance of hybrids in the presence of electron-electron interactions and demonstrate that this length Lϕ can ...
Added: February 9, 2015
Marques C. A., Neat M. J., Yim C. M. et al., New Journal of Physics 2020 Vol. 22 No. June Article 063049
In a superconductor that lacks inversion symmetry, the spatial part of the Cooper pair wave function has a reduced symmetry, allowing for the mixing of spin-singlet and spin-triplet Cooper pairing channels and thus providing a pathway to a non-trivial superconducting state. Materials with a non-centrosymmetric crystal structure and with strong spin–orbit coupling are a platform ...
Added: October 11, 2020
Pudalov V., Vlasenko V., Pervakov K. et al., IEEE Transactions on Applied Superconductivity 2019 Vol. 29 No. 3 P. 6900505-1-5
The FeSe wires and tapes with Fe (S22 steel) and Cu/Nb sheath were fabricated by various modifications of the
powder-in-tube (PIT) method. The superconducting critical parameters (upper critical field, critical current, critical temperature) depending on heat treatment time were investigated using resistive R(T) and transport measurements I (V) in magnetic fields up to 9T. The low-temperature ...
Added: November 26, 2019
Peltonen J. T., Astafiev O. V., Korneeva Y. P. et al., Physical Review B: Condensed Matter and Materials Physics 2013 Vol. 88 P. 220506-1-220506-5
We demonstrate evidence of coherent magnetic flux tunneling through superconducting nanowires patterned in a thin highly disordered NbN film. The phenomenon is revealed as a superposition of flux states in a fully metallic superconducting loop with the nanowire acting as an effective tunnel barrier for the magnetic flux, and reproducibly observed in different wires. The ...
Added: March 13, 2014
Saveskul N. A., Titova N. A., Baeva E. et al., Physical Review Applied 2019 Vol. 12 No. 5 P. 1-10
We analyze the evolution of the normal and superconducting properties of epitaxial TiN films, characterized by high Ioffe-Regel parameter values, as a function of the film thickness. As the film thickness decreases, we observe an increase of the residual resistivity, that becomes dominated by diffusive surface scattering for d≤20nm. At the same time, a substantial thickness-dependent ...
Added: October 10, 2019
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
Семенов А. В., Девятов И. А., Третьяков И. В. et al., Журнал радиоэлектроники 2011 № 11
Nonlinear Ginzburg-Landau equation for dirty supercondicting 1D wire is derived in the limit of high magnetic field. ...
Added: October 12, 2017
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
Trofimova T., М. : КноРус, 2015
Пособие охватывает раздел «Электродинамика» курса физики для инженерно-технических специальностей высших учебных заведений и отвечает программе по физике. Изложение ведется без громоздких математических выкладок, большое внимание уделено разъяснению физической сути явлений и описывающих их понятий, а также преемственности современной и классической физики. Для студентов инженерно-технических специальностей высших учебных заведений. Может быть использовано преподавателями всех типов средних учебных заведений, ...
Added: February 25, 2015
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
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
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
Stepanov N., Skvortsov M. A., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 97 No. 14 P. 144517-1-144517-16
We study the effect of superconducting fluctuations on the conductivity of metals at arbitrary temperatures T and impurity scattering rates τ−1. Using the standard diagrammatic technique but in the Keldysh representation, we derive the general expression for the fluctuation correction to the dc conductivity applicable for any space dimensionality and analyze it in the case of the film ...
Added: June 6, 2018
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
Eminov P. A., Ul’din A., Low Temperature Physics 2011 Т. 37 № 4 С. 356-359
Вычислен термодинамический потенциал сверхпроводящего квантового цилиндра. Изучена зависимость критической температуры и теплоемкости сверхпроводящей системы от поверхностной концентрации электронов и радиуса нанотрубки. Показано, что критическая температура осциллирует при изменении параметра, равного отношению энергии Ферми к энергии размерного конфайнмента. ...
Added: December 31, 2012