Abstract
Superconductor-ferromagnet-superconductor (SFS) Josephson junctions are known to exhibit a transition between π and 0 states. In this letter, we find the π-0 phase diagram of an SFS junction depending on the transparency of an intermediate insulating layer (I). We show that, in general, the Josephson critical current is nonzero at the π-0 transition temperature. Contributions to the current from the two spin channels nearly compensate each other, and the first harmonic of the Josephson current as a function of phase difference is suppressed. However, higher harmonics give a nonzero contribution to the supercurrent.
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From Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 74, No. 6, 2001, pp. 357–361.
Original English Text Copyright © 2001 by Chtchelkatchev, Belzig, Nazarov, Bruder.
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Chtchelkatchev, N.M., Belzig, W., Nazarov, Y.V. et al. π-0 transition in superconductor-ferromagnet-superconductor junctions. Jetp Lett. 74, 323–327 (2001). https://doi.org/10.1134/1.1421408
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DOI: https://doi.org/10.1134/1.1421408