Critical temperature and superfluid density suppression in disordered high-$T_c$ cuprate superconductors
Abstract
We argue that the standard Abrikosov-Gorkov (AG) type theory of in disordered -wave superconductors breaks down in short coherence length high- cuprates. Numerical calculations within the Bogoliubov-de Gennes formalism demonstrate that the correct description of such systems must allow for the spatial variation of the order parameter, which is strongly suppressed in the vicinity of impurities but mostly unaffected elsewhere. Suppression of as measured with respect to the attendant decrease in the superfluid density is found to be significantly weaker than that predicted by the AG theory, in good agreement with experiment.
Keywords
Cite
@article{arxiv.cond-mat/9610167,
title = {Critical temperature and superfluid density suppression in disordered high-$T_c$ cuprate superconductors},
author = {M. Franz and C. Kallin and A. J. Berlinsky and M. I. Salkola},
journal= {arXiv preprint arXiv:cond-mat/9610167},
year = {2009}
}
Comments
REVTeX, 4 pages, 3 ps figures included [The version to appear in PRB Sept. 1. Conclusions of the paper unchanged; several changes in text and figures for added clarity, discussion of phase fluctuations added.]