Resistance Anomaly in Disordered Superconducting Films

Details Resistance Anomaly in Disordered Superconducting Films Resistance Anomaly in Disordered Superconducting Films

2007-01-19

arxiv.org/abs/cond-mat/0701483v1

Appl. Phys. Lett. 90, 072507 (2007)

Physics

Condensed Matter

Superconductivity

14 pages, 3 figures, accepted for publication in Applied Physics Letters

Scientific paper

10.1063/1.2680068

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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