Critical current in a system of two superconductors connected by a short small-diameter normal metal bridge |
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| Authors: | Yu. N. Ovchinnikov A. I. Larkin |
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| Affiliation: | (1) Landau Institute for Theoretical Physics, Russian Academy of Sciences, Moscow, 117940, Russia;(2) Max-Planck Institute for Physics of Complex System, D-01187 Dresden, Germany;(3) Theoretical Physical Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA |
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| Abstract: | It is shown that states with phase increments δ?>π can form in superconductor-narrowing (normal metal)-superconductor systems. If the conditions a?l?ξ(0), where a is the cross-sectional size of the narrowing, l is the length of narrowing, and ξ(0) is the correlation radius at zero temperature, are satisfied, there is a region of parameters (a, l, ξ(0), T) in which the critical current is attained in solutions with a phase difference δ?>π. |
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