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Resistance Anomaly in Disordered Superconducting Films

J. Hua·Z. L. Xiao·D. Rosenmann·I. S. Beloborodov·U. Welp·W. K. Kwok·G. W. Crabtree
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Abstract

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.

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J. Hua, Z. L. Xiao, D. Rosenmann, I. S. Beloborodov, U. Welp, W. K. Kwok, G. W. Crabtree. 2007-01-19. Resistance Anomaly in Disordered Superconducting Films. https://doi.org/10.1063/1.2680068

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