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## Interplay between Josephson and Aharonov-Bohm effects in Andreev interferometers

Scientific Reports. 2019. Vol. 9. P. 1-9.

Proximity induced quantum coherence of electrons in multi-terminal voltage-driven hybrid normalsuperconducting

nanostructures may result in a non-trivial interplay between topology-dependent

Josephson and Aharonov-Bohm effects. We elucidate a trade-off between stimulation of the voltagedependent

Josephson current due to non-equilibrium effects and quantum dephasing of quasiparticles

causing reduction of both Josephson and Aharonov-Bohm currents. We also predict phase-shifted

quantum coherent oscillations of the induced electrostatic potential as a function of the externally

applied magnetic flux. Our results may be employed for engineering superconducting nanocircuits with

controlled quantum properties.

Dolgirev P. E., Kalenkov M. S., Zaikin Andrei D., Physica Status Solidi - Rapid Research Letters 2019 Vol. 13 No. 1 P. 1800252-1-1800252-5

We theoretically investigate coherent oscillations of the thermopower S as a function of the magnetic flux Ф in six-terminal Andreev interferometers. We demonstrate that the thermopower behavior is determined by a number of
contributions originating from the Josephson- and Aharonov–Bohm-like effects as well as from electron–hole asymmetry. The relative weight of these contributions depends on the ...

Added: October 26, 2018

Kalenkov M. S., Dolgirev P. E., Zaikin A., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 101 No. 18 P. 180505-1-180505-5

We demonstrate that a temperature gradient can strongly stimulate the thermoelectric signal, as well as
dc Josephson current, in multiterminal superconducting hybrid nanostructures. At temperatures T sufficiently
exceeding the Thouless energy of our device, both the supercurrent and the thermoinduced voltage are
dominated by the contribution from nonequilibrium low-energy quasiparticles and are predicted to decay slowly
(algebraically rather than ...

Added: May 10, 2020

Dolgirev P. E., Kalenkov M. S., Tarkhov A. et al., Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 100 No. 054511 P. 1-11

We present a detailed theoretical description of quantum coherent electron transport in voltage-biased
crosslike Andreev interferometers.Making use of the charge conjugation symmetry encoded in the quasiclassical
formalism, we elucidate a crucial role played by geometric and electron-hole asymmetries in these structures.
We argue that a nonvanishing Aharonov-Bohm-like contribution to the current IS flowing in the superconducting
contour may develop ...

Added: September 12, 2019

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

T. Karabassov, A. V. Guravova, Kuzin A. Y. et al., Beilstein Journal of Nanotechnology 2020 Vol. 11 P. 252-262

We present a quantitative study of the current-voltage characteristics (CVC) of SFIFS Josephson junctions (S denotes bulk superconductor, F - metallic ferromagnet, I - insulating barrier) with weak ferromagnetic interlayers in the diffusive limit. The problem is solved in the framework of the nonlinear Usadel equations. We consider the case of a strong tunnel barrier ...

Added: November 8, 2019

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

Arutyunov K., Lehtinen J. S., Beilstein Journal of Nanotechnology 2020 Vol. 11 P. 417-420

Chain of superconductor-insulator-superconductor junctions based on Al-AlOx-Al... lift-off fabricated nanostructures was measured at ultra-low temperatures. At zero magnetic field the low current bias dynamic resistance can reach values ~1011 W. The system has been proved to provide a decent quality current biasing circuit enabling observation of Coulomb blockade and Bloch oscillations in ultra-narrow Ti nanowires ...

Added: September 18, 2020

Lounis B., Buzdin A. I., Physical Review B: Condensed Matter and Materials Physics 2022 Vol. 105 No. 2 Article L020504

We theoretically study the nonequilibrium dynamics of the order parameter of a superconducting ring inhomogeneously quenched through its transition temperature. Numerical simulations based on spectral decomposition of the time-dependent Ginzburg-Landau equation reveal that current-carrying superconducting states can be generated in the ring under certain fast local temperature quench conditions. We also show that illumination of ...

Added: December 10, 2022

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

НАМАГНИЧЕННОСТЬ В БИСЛОЯХ СВЕРХПРОВОДНИК–ФЕРРОМАГНИТНЫЙ МЕТАЛЛ, ВЫЗВАННАЯ ОБРАТНЫМ ЭФФЕКТОМ БЛИЗОСТИ

Yagovtsev V., Pugach N., Екомасов Е. Г. et al., Физика металлов и металловедение 2021 № 9 С. 908-916

Within the Green’s function formalism, the magnetization induced by the inverse proximity effect in bilayers containing a superconductor and a strongly spin-polarized ferromagnetic metal is studied. The Usadel equations written for the dirty superconductor model are solved with boundary conditions suitable for strongly spin-polarized ferromagnetic materials. The cases of near-critical temperatures and a weak proximity ...

Added: October 31, 2021

Мальшуков А. Г., Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 100 P. 035301-1-035301-7

A nonstationary anomalous Hall current is calculated for a voltage biased Josephson junction, which is composed of two s-wave superconducting contacts deposited on the top of a three-dimensional topological insulator (TI). A homogeneous Zeeman field was assumed at the surface of the TI. The problem has been considered within the ballistic approximation and on the ...

Added: March 11, 2020

Turkin Y. V., Pugach N., Екомасов Е. Г. et al., Физика металлов и металловедение 2023 Т. 124 № 1 С. 42-48

This paper presents a theoretical study of the dynamics of the induced magnetization and spin current
arising in a layer of an dirty superconductor due to the proximity to a ferromagnetic dielectric with a
uniform periodically precessing magnetization. The dynamics of the observed physical quantities is described
within the semi-classical Usadel–Floquet formalism, which makes it possible to study ...

Added: November 17, 2022

Sasaki A., Ikegaya S., Habe T. et al., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 101 No. 184501 P. 184501-1-184501-6

We study theoretically the Josephson effect between two two-band superconductors respecting time-reversal
symmetry, where we assume a spin-singlet s-wave pair potential in each conduction band. The superconducting
phase at the first band ϕ1 and that at the second band ϕ2 characterize a two-band superconducting state. We
consider a Josephson junction where an insulating barrier separates two such two-band ...

Added: October 8, 2020

Demenev A. A., Grishina Y. V., Larionov A. V. et al., Physical Review B: Condensed Matter and Materials Physics 2017 Vol. 96 No. 15 P. 155308-1-155308-10

We address polarization instability in a freely decaying polariton condensate created by 2-ps-long linearly polarized laser pulses in the upper sublevel of the lower-polariton (LP) branch in a GaAs-based microcavity with reduced symmetry. The generated linearly polarized condensate is found to lose its stability at excitation densities above the threshold value: it passes into the ...

Added: February 15, 2018

Bezuglyi E. V., Vasenko A. S., Shumeiko V. S. et al., Physical Review B: Condensed Matter and Materials Physics 2005 Vol. 72 No. 1 P. 014501-1-014501-12

We study nonequilibrium effects in current transport through voltage biased tunnel junction with long diffusive superconducting leads at low applied voltage eV << 2 Delta, and finite temperatures. Due to a small value of the Josephson frequency, the quasiparticle spectrum adiabatically follows the time evolution of the superconducting phase difference, which results in the formation ...

Added: November 29, 2017

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.V. Guravova, A.Yu. Kuzin et al., Beilstein Journal of Nanotechnology 2020 Vol. 11 P. 252-262

We present a quantitative study of the current–voltage characteristics (CVC) of SFIFS Josephson junctions (S = bulk superconductor, F = metallic ferromagnet, I = insulating barrier) with weak ferromagnetic interlayers in the diffusive limit. The problem is solved in the framework of the nonlinear Usadel equations. We consider the case of a strong tunnel barrier ...

Added: February 13, 2020

Рекламно-издательский центр "ТЕХНОСФЕРА", 2020

Специальный выпуск Международный форум «Микроэлектроника-2019» 5-я Международная научная конференция «Электронная компонентная база и микроэлектронные модули». Республика Крым, г. Алушта, 30 сентября – 5 октября 2019 г. ...

Added: June 26, 2020

Verbus V. A., Novikov A. V., Yurasov D. V. et al., Semiconductors 2018 Vol. 52 No. 11 P. 1442-1447

The formation and properties of locally tensile strained Ge microstructures (“microbridges”) based on Ge layers grown on silicon substrates are investigated. The elastic-strain distribution in suspended Ge microbridges is analyzed theoretically. This analysis indicates that, in order to attain the maximum tensile strain within a microbridge, the accumulation of strain in all corners of the ...

Added: December 26, 2018

Budkov Y., М. : ЛЕНАНД, 2020

Within the presented monograph for the first time statistical approaches, based on the self-consistent field theory, were presented for the theoretical description of the thermodynamic properties of the ion-molecular systems (electrolyte solutions, ionic liquids, dielectric polymers and metal-organic frameworks) in the bulk solution and at the interfaces with the account for their molecular structure. In ...

Added: November 18, 2019

Свинарев Ф. Б., Балашова Е. В., Кричевцов Б. Б. et al., Journal of Physics: Conference Series 2018 Vol. 1038 P. 012117

The polarization switching was studied in single crystals and thin films of 2- methylbenzimidazole (MBI) obtained by evaporation method from an MBI ethanol solution. Dielectric hysteresis loops were measured in the temperature interval 290-390 K and frequency range 20-1000 Hz for different amplitudes of the electric field. The Kolmogorov β-model with account of Mertz law ...

Added: November 10, 2020

Zhukov A., Moiseev E., Nadtochiy A. et al., Письма в Журнал технической физики 2020 Т. 46 № 16 С. 3-6

AlGaAs/GaAs microdisk lasers with InAs/InGaAs quantum dots region were transferred onto a silicon wafer using indium bonding. Microlasers have a joint electrical contact put over a residual n+ GaAs substrate, whereas their individual addressing is achieved by placing them p-contact down to separate contact pads. No effect of non-native substrate on electrical resistance, threshold current, ...

Added: August 25, 2020

Fedorov P. P., Luginina A. A., Kuznetsov S. V. et al., Cellulose 2019 Vol. 26 P. 2403-2423

The synthesis of up-conversion luminescent composite films based on a nanocellulose matrix containing Sr1−xHoxF2+x particles was proposed. The combination of sulfuric acid hydrolysis and ultrasonication allowed us to synthesize a series of stable nanocellulose dispersions from various raw materials (powdered sulphate bleached wood pulp, Blue Ribbon filter paper, and microcrystalline cellulose Avicel). The size distribution of ...

Added: May 29, 2020

Duarte E. C., Sardella E., Teixeira Saraiva T. et al., / Cornell University. Series cond-mat "arxiv.org". 2022. No. 2209.

The presence of magnetic fields and/or transport currents can cause penetration of vortices in superconductors. Their motion leads to dissipation and resistive state arises, which in turn strongly affects the performance of superconducting devices such as single-photon and single-electron detectors. Therefore, an understanding of the dissipation mechanisms in mesoscopic superconductors is not only of fundamental ...

Added: November 7, 2022