Effect of spatial variations of superconducting gap on suppression of the transition temperature by impurities

Preprint

4 February 1998

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9802055

Abstract

We calculate correction to the critical temperature of a dirty superconductor, which results from the local variations of the gap function near impurity sites. This correction is of the order of T_c/E_F and becomes important for short-coherence length superconductors. It generally reduces a pair-breaking effect. In s-wave superconductors small amounts of nonmagnetic impurities can increase the transition temperature.

Keywords

TRANSITION TEMPERATURE
SUPERCONDUCTING GAP
EFFECT OF SPATIAL
SUPERCONDUCTORS
IMPURITIES
LOCAL

All Related Versions

Version 1, 1998-02-04, ArXiv
Published version: Physical Review Letters, 80 (24), 5413.

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