Fizika Nizkikh Temperatur: Volume 46, Number 9 (September 2020), p. 1088-1091    ( to contents , go back )

Critical current of dc SQUID on Josephson junctions with unconventional current-phase relation

I. N. Askerzade1,2 and R. T. Askerbeyli3

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 Azerbaijan National Academy of Sciences, Baku AZ-1143, Azerbaijan

3Karabuk University, Department of Business Administration, Karabuk, Turkey

Received April 24, 2020, published online July 22, 2020

Abstract

Here we present calculations of the critical current of dc SQUID based on Josephson junction with unconventional current-phase relation. We analyzed two cases of current-phase relation of junction: with anharmonic and Majorana term. It is shown that the changing of the critical current in the case of the small geometrical inductance of dc SQUID based on Josephson junctions with unconventional current-phase relation is determined by the amplitude of the second term in current-phase relation, the geometrical inductance of dc SQUID and external magnetic field. In the case of the high inductance of dc SQUID unconventional terms can be ignored.

Key words: dc SQUID, current-phase relation, anharmonic and Majorana terms.

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