Physics of the Solid State, volume 61, issue 9, pages 1675-1681
Microwave Impedance of Thin-Film Superconductor–Normal Metal Hybrid Structures with a High Conductivity Ratio
Ustavshchikov S S
1, 2
,
Aladyshkin A. Yu.
1, 2
,
Kurin V. V.
1, 2
,
Markelov V A
1
,
Elkina A I
1
,
Klushin A. M.
1
,
Yunin P. A.
1, 2
,
ROGOV V. V.
1
,
Publication type: Journal Article
Publication date: 2019-09-03
Journal:
Physics of the Solid State
Quartile SCImago
Q4
Quartile WOS
Q4
Impact factor: 0.6
ISSN: 10637834, 10906460, 17267498
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
The temperature dependence of the linear electrodynamic response of thin-film superconductor (MoN)–normal metal (Al) hybrid structures with a high conductivity ratio in the normal state has been theoretically and experimentally investigated. Low-frequency measurements of the coefficient of mutual induction of two coils with a sample placed between them indicate an increase in the magnetic screening of the superconductor–normal metal (SN) structures with an increase in the Al layer thickness dAl near liquid-helium temperatures. Measurements of the frequency shift δf of a microwave dielectric resonator, brought into contact with the sample, as a function of temperature and dAl showed that (i) the character of the dependence δf(T) depends strongly on dAl and (ii) the resonance frequency shift of SN structures at temperatures close to the critical temperature Tc is not described by dependence const/(1 – T/Tc), which is typical of thin superconducting films. Numerical calculations performed within the Usadel model well describe the observed effects. Thus, these anomalies of the electrodynamic properties of SN structures can be explained by the presence of a minigap in the spectrum of quasiparticles due to the proximity effect in a normal-metal layer, which depends on dAl, and by the high conductivity of the Al layer.
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Ustavshchikov S. S. et al. Microwave Impedance of Thin-Film Superconductor–Normal Metal Hybrid Structures with a High Conductivity Ratio // Physics of the Solid State. 2019. Vol. 61. No. 9. pp. 1675-1681.
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Ustavshchikov S. S., Aladyshkin A. Y., Kurin V. V., Markelov V. A., Elkina A. I., Klushin A. M., Yunin P. A., ROGOV V. V., Vodolazov D. Yu. Microwave Impedance of Thin-Film Superconductor–Normal Metal Hybrid Structures with a High Conductivity Ratio // Physics of the Solid State. 2019. Vol. 61. No. 9. pp. 1675-1681.
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TY - JOUR
DO - 10.1134/s1063783419090270
UR - https://doi.org/10.1134%2Fs1063783419090270
TI - Microwave Impedance of Thin-Film Superconductor–Normal Metal Hybrid Structures with a High Conductivity Ratio
T2 - Physics of the Solid State
AU - Ustavshchikov, S S
AU - Aladyshkin, A. Yu.
AU - Kurin, V. V.
AU - Markelov, V A
AU - Elkina, A I
AU - Klushin, A. M.
AU - Yunin, P. A.
AU - ROGOV, V. V.
AU - Vodolazov, D Yu
PY - 2019
DA - 2019/09/03 00:00:00
PB - Pleiades Publishing
SP - 1675-1681
IS - 9
VL - 61
SN - 1063-7834
SN - 1090-6460
SN - 1726-7498
ER -
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@article{2019_Ustavshchikov,
author = {S S Ustavshchikov and A. Yu. Aladyshkin and V. V. Kurin and V A Markelov and A I Elkina and A. M. Klushin and P. A. Yunin and V. V. ROGOV and D Yu Vodolazov},
title = {Microwave Impedance of Thin-Film Superconductor–Normal Metal Hybrid Structures with a High Conductivity Ratio},
journal = {Physics of the Solid State},
year = {2019},
volume = {61},
publisher = {Pleiades Publishing},
month = {sep},
url = {https://doi.org/10.1134%2Fs1063783419090270},
number = {9},
pages = {1675--1681},
doi = {10.1134/s1063783419090270}
}
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Ustavshchikov, S. S., et al. “Microwave Impedance of Thin-Film Superconductor–Normal Metal Hybrid Structures with a High Conductivity Ratio.” Physics of the Solid State, vol. 61, no. 9, Sep. 2019, pp. 1675-1681. https://doi.org/10.1134%2Fs1063783419090270.