Pairbreaking Without Magnetic Impurities in Disordered Superconductors
Superconductivity
2016-08-31 v2 Strongly Correlated Electrons
Abstract
We study analytically the effects of inhomogeneous pairing interactions in short coherence length superconductors, using a spatially varying Bogoliubov-deGennes model. Within the Born approximation, it reproduces all of the standard Abrikosov-Gor'kov pairbreaking and gaplessness effects, even in the absence of actual magnetic impurities. For pairing disorder on a single site, the T-matrix gives rise to bound states within the BCS gap. Our results are compared with recent scanning tunneling microscopy measurements on BiSrCaCuO with Zn or Ni impurities.
Cite
@article{arxiv.cond-mat/0203124,
title = {Pairbreaking Without Magnetic Impurities in Disordered Superconductors},
author = {Amit K. Chattopadhyay and Richard A. Klemm and Debanand Sa},
journal= {arXiv preprint arXiv:cond-mat/0203124},
year = {2016}
}
Comments
4 pages, 2 figures, submitted to PRL