Theory of AC Josepson Effect in Superconducting Constrictions

Details Theory of AC Josepson Effect in Superconducting Constrictions Theory of AC Josepson Effect in Superconducting Constrictions

1997-08-25

arxiv.org/abs/cond-mat/9708190v1

Physics

Condensed Matter

Superconductivity

11 pages, RevTex, 3 figures available on request

Scientific paper

10.1103/PhysRevLett.80.3602

We have developed a microscopic theory of ac Josephson effect in short ballistic superconducting constrictions with arbitrary electron transparency and in constrictions with diffusive electron transport. The theory is valid for arbitrary miscroscopic structure of the superconducting electrodes of the constriction. As applications of the theory we study smearing of the subgap current singularities by pair-breaking effects and also the structure of these singularities in the constrictions between the composite S/N electrodes with the proximity-induced gap in the normal layer.

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