We report on a resistance anomaly in disordered superconducting films containing arrays of irregularly distributed nanoscale holes. At high driving currents, peaks appear in the resistance as a function of temperature, with peak values up to 2% above the classic normal-state resistance. We attribute the observed resistance anomaly to dissipation-induced granularity which enhances the contributions from fluctuation-induced reduction of the density of states of the quasiparticles. The granular feature of a disordered superconducting film originates from the inhomogeneous temperature distribution caused by the variation of the local dissipation and/or heat transfer.
@article{arxiv.cond-mat/0701483,
title = {Resistance Anomaly in Disordered Superconducting Films},
author = {J. Hua and Z. L. Xiao and D. Rosenmann and I. S. Beloborodov and U. Welp and W. K. Kwok and G. W. Crabtree},
journal= {arXiv preprint arXiv:cond-mat/0701483},
year = {2009}
}
Comments
14 pages, 3 figures, accepted for publication in Applied Physics Letters