ANOMALOUS FLUX-FLOW DYNAMICS IN LAYERED TYPE-II SUPERCONDUCTORS AT LOW-TEMPERATURES

Low-temperature dissipation due to vortex motion in strongly anisotrop ic type-II superconductors with a moderate disorder (Delta(2)/E(F) muc h less than (h) over bar/tau much less than Delta) is shown to be dete rmined by the Zener-type transitions between the localized electronic states in the vortex core. Statistics of these levels is described by the random matrix ensemble of class C defined recently by Atland and Z irnbauer, so the vortex motion leads naturally to a new example of a p arametric statistics of energy levels. The flux-flow conductivity sigm a(xx) is a bit lower than the quasiclassical one and grows slowly with the increase of the electric field.