Superconductivity in Disordered Thin Films: Giant Mesoscopic Fluctuations
M. A. Skvortsov, M. V. Feigel’man
DOI 10.1103/PhysRevLett.95.057002 · Physical Review Letters
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Abstract
We discuss the intrinsic inhomogeneities of superconductive properties of uniformly disordered thin films with a large dimensionless conductance g. It is shown that mesoscopic fluctuations, which usually contain a small factor 1/g, are crucially enhanced near the critical conductance gcF≫1 where superconductivity is destroyed at T=0 due to Coulomb suppression of the Cooper attraction. This leads to strong spatial fluctuations of the local transition temperature and thus to the percolative nature of the thermal superconductive transition.
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