Fizika Nizkikh Temperatur: Volume 47, Number 4 (April 2021), p. 309-314    ( to contents , go back )

Frustration effect on escape rate in Josephson junctions between single-band and three-band superconductors in the macroscopic quantum tunneling regime

I. N. Askerzade1,2 and A. Aydin1

1Department of Computer Engineering and Center of Excellence of Superconductivity Research, Ankara University Ankara 06100, Turkey
E-mail: imasker@eng.ankara.edu.tr

2Institute of Physics of the National Academy of Sciences of Azerbaijan, Baku AZ1143, Azerbaijan
pos Анотація:625

Received October 13, 2020, published online February 26, 2021

Abstract

The escape rate of S → R switching (from superconducting S state to resistive R state) in Josephson junction formed by s-wave single-band (SB) and three-band (ThB) superconductors (SB/ThB junctions) in macroscopic quantum tunneling regime is investigated. We use the effective critical current approximation in SB/ThB junctions. It was shown that escape rate can exhibit qualitative features in the case of frustration effects in ThB superconductors. Inclusion of Leggett modes in ThB superconductors leads to enhancement of escape rate in three-channel Josephson junction in comparison with single-channel junctions.

Key words: Josephson junctions, quantum tunneling, single-band and three-band superconductors.

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