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Сверхпроводящие фазы и вторая джозефсоновская гармоника в туннельных контактах между диффузными сверхпроводниками
С. 108–109.
Осин А. С., Fominov Y.
Language:
Russian
Publication based on the results of:
In book
Т. 1. , Н. Новгород: Издательство Нижегородского университета, 2022.
Semenov A. G., Latyshev A., Andrei D. Zaikin, Physical Review B: Condensed Matter and Materials Physics 2025 Vol. 112 No. 14 Article 144501
We investigate the effects of fluxon cotunneling and quantum Coulomb drag in a system of two small
Josephson junctions coupled by means of mutual capacitanceCm. Depending on the value ofCm we identify three
different regimes of strong, intermediate, and weak coupling. Focusing our attention on the last two regimes we
develop a perturbation theory in the interaction and ...
Added: November 14, 2025
Galaktionov A. V., Zaikin A., Journal of Superconductivity and Novel Magnetism 2025 Vol. 38 Article 74
We present a detailed numerical analysis of a non-equilibrium current-phase relation for transparent Josephson junctions in the voltage-biased regime. In the limit of subgap voltages and temperatures, we demonstrate an important role of phase-periodic dissipative effects which significantly modify the current-phase relation for such superconducting weak links. ...
Added: March 17, 2025
Kalenkov M., Andrei D. Zaikin, Physical Review B: Condensed Matter and Materials Physics 2024 Vol. 110 No. 13 Article 134521
We develop a microscopic theory of ac Josephson effect in superconducting junctions described by an arbitrary
scattering matrix that may include magnetic effects. In the limit of constant in time bias voltage V applied to the
junction we derive a formally exact current-phase relation (CPR) that is manifestly 2π periodic in the Josephson
phase ϕ in full accordance ...
Added: November 10, 2024
Yu. Makhlin, Zorin A. B., Journal of Experimental and Theoretical Physics 2024 Vol. 166 No. 1(7) P. 98–109
We analyze properties of bifurcation quantum detectors based on weakly nonlinear superconducting resonance circuits, in particular, with application to quantum readout. The developed quantitative description demonstrates strong influence of higher harmonics on their characteristics. While this effect is relevant for various circuits, including the conventional Josephson bifurcation amplifier and the parametrically driven circuit, we first ...
Added: June 27, 2024
Galaktionov A. V., Zaikin A., Beilstein Journal of Nanotechnology 2024 Vol. 15 P. 51–56
We investigate Josephson dynamics of highly transparent superconducting nanojunctions at subgap voltages and temperatures. In this limit, intrinsic dissipation in such junctions turns out to be sub-Ohmic, which yields a linear dependence of the average voltage on the bias current I slightly exceeding the critical one Ic. We demonstrate a strong impact of intrinsic sub-Ohmic ...
Added: April 21, 2024
Galaktionov A., Andrei D. Zaikin, Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 107 No. 21 Article 214507
We theoretically analyze Josephson dynamics of superconducting weak links with transmissions T not much smaller than unity at subgap bias voltages V. Employing the effective action approach cjmbined with the Keldysh technique, we develop a regular perturbation theory in R=1-T and derive the first odrder correction to the current across the weak link, which consists ...
Added: April 17, 2024
Ovcharenko H. V., Maizelis Z. A., Apostolov S. S. et al., Physical Review B: Condensed Matter and Materials Physics 2022 Vol. 106 No. 17 Article 174511
We theoretically study the propagation of a terahertz (THz) Gaussian beam through a thin sample of layered superconductor. We consider the beam axis and the superconducting layers to be perpendicular to the sample interface, while the electric field in the beam is perpendicular to the layers. We show that, in such a geometry, the Josephson ...
Added: February 6, 2023
Левичев М. Ю., Елькина А. И., Бухаров Н. Н. et al., Физика твердого тела 2019 Т. 61 С. 1594–1598
Исследованы сильно разупорядоченные тонкие пленки из нитрида ниобия и особенности проявления эффекта близости в бислоях NbN (S) - алюминий (N) с большим соотношением их удельных сопротивлений. Показано, что магнитное экранирование и критический ток Ic таких SN структур значительно возрастают по сравнению с S слоем. Наблюдаемый эффект связан с возникновением наведенной сверхпроводимости в N слое за ...
Added: September 16, 2022
Ziegler K., Sinner A., Yurii E. Lozovik, Physical Review Letters 2022 Vol. 128 No. 12 Article 157001
We consider s-wave pairing in a double layer of two chiral metals due to interlayer Coulomb interaction and study the Josephson effect near a domain wall, where the sign of the order parameter jumps. The domain wall creates two evanescent modes at the exceptional zero-energy point, whose superposition is associated with currents flowing in different ...
Added: May 9, 2022
Osin A. S., Fominov Ya.V., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 104 No. 6 Article 064514
We consider a planar SIS-type Josephson junction between diffusive superconductors (S) through an insulating tunnel interface (I). We construct fully self-consistent perturbation theory with respect to the interface conductance. As a result, we find correction to the first Josephson harmonic and calculate the second Josephson harmonic. At arbitrary temperatures, we correct previous results for the ...
Added: September 2, 2021
Mal'shukov A., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 102 P. 134509-1–134509-5
The Zeeman interaction results in spontaneous current through a Josephson contact with a spin-orbit coupled
normal metal, even in the absence of any voltage, or phase bias. In the case of the Rashba spin-orbit coupling
of electrons in a two-dimensional (2D) electron gas this effect takes place for the Zeeman field which is parallel
to the 2D system ...
Added: January 20, 2021