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    Critical current of dc SQUID on Josephson junctions with unconventional current-phase relation
    (Institute for Low Temperature Physics and Engineering, 2020) Askerzade, I.N.; Askerbeyli, R.T.
    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. © I. N. Askerzade and R. T. Askerbeyli, 2020
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    Escape rate in ac SQUID on Josephson junction based on single- and multi-band superconductors in thermal activation regime
    (B.Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine, 2023) Aydin, A.; Askerzade, I.N.; Askerbeyli, R.
    The escape rate of S?R switching (from superconducting S state to unstable resistive R state) in an ac SQUID with Josephson junction based on single- and multi-band superconductors is investigated by taking the frustration effects in a multi-band superconducting state into account. Using the effective critical current approach, it is shown that the escape rate in thermal activation regime can manifest qualitative features caused by the frustration effects in two- and three-band superconductors. © 2023 Institute for Low Temperature Physics and Engineering. All rights reserved.
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    Return current of dc SQUID based on tunnel Josephson junctions with unconventional current-phase relation
    (Institute for Low Temperature Physics and Engineering, 2021) Askerzade, I.N.; Askerbeyli, R.
    We carried out the analysis of the return current of dc SQUID based on tunnel Josephson junction with un-conventional current-phase relation. We analyzed two cases of current-phase relation with additional terms to the first harmonic sin ?: a case of the second harmonic sin 2? and the case of the fractional term sin (?/2). It is shown that the changing of the return current of dc SQUID on junctions with unconventional current-phase rela-tion is determined by the amplitude of the second term in current-phase relation, geometrical inductance, and ex-ternal magnetic field. © I. N. Askerzade and R. Askerbeyli, 2021.