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arXiv · 1002.1481

Magnetic interference patterns in superconducting junctions: Effects of anharmonic current-phase relations

Yu. S. Barash
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Abstract

A microscopic theory of the magnetic-field modulation of critical currents is developed for plane Josephson junctions with anharmonic current-phase relations. The results obtained allow examining temperature-dependent deviations of the modulation from the conventional interference pattern. For tunneling through localized states in symmetric short junctions with a pronounced anharmonic behavior, the deviations are obtained and shown to depend on distribution of channel transparencies. For constant transparency the deviations vanish not only near Tc, but also at T=0. If Dorokhov bimodal distribution for transparency eigenvalues holds, the averaged deviation increases with decreasing temperature and takes its maximum at T=0.

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Yu. S. Barash. 2010-08-16. Magnetic interference patterns in superconducting junctions: Effects of anharmonic current-phase relations. https://doi.org/10.1209/0295-5075%2F91%2F37001

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