Phys. Rev. B 56, 7882–7885 (1997)

Critical temperature and superfluid density suppression in disordered high-T_c cuprate superconductors

Abstract

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M. Franz
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218

C. Kallin, A. J. Berlinsky, and M. I. Salkola
Department of Physics, Stanford University, Stanford, California 94305

Received 8 May 1997; published in the issue dated 1 October 1997

We argue that the standard Abrikosov-Gorkov (AG)-type theory of T_c in disordered d-wave superconductors breaks down in short coherence length high-T_c 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 T_c is found to be significantly weaker than that predicted by the AG theory, in good agreement with experiment.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.56.7882

DOI:

10.1103/PhysRevB.56.7882

PACS:

74.20.De, 74.62.Dh, 74.72.-h

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Phys. Rev. B 56, 7882–7885 (1997)

Critical temperature and superfluid density suppression in disordered high-Tc cuprate superconductors

Critical temperature and superfluid density suppression in disordered high-T_c cuprate superconductors