Superconductivity in disordered thin films: giant mesoscopic fluctuations.
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 g(cF) >> 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.
Skvortsov
M A
MA
L. D. Landau Institute for Theoretical Physics, Moscow 119334, Russia. skvor@itp.ac.ru
Feigel'man
M V
MV