Transport Properties of "Extended-s" State Superconductors

Abstract

Superconducting states with "extended s-wave" symmetry have been suggested in connection with recent ARPES experiments on BSCCO. In the presence of impurities, thermodynamic properties of such states reflect a residual density of states $N(0)$ for a range of concentrations. While properties reflecting $N(\omega )$ alone will be similar to those of d-wave states, transport measurements may be shown to qualitatively distinguish between the two. In contrast to the d-wave case with unitarity limit scattering, limiting low-temperature residual conductivities in the s-wave state are large and scale inversely with impurity concentration.

4 pages, 5 figures, uuencoded compressed postscript file

References in corpus (1)

• d-Wave Model for Microwave Response of High-Tc Superconductors

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