title: Dephasing in disordered metals with superconductive grains.
abstract: The temperature dependence of electron dephasing time tau(phi)(T) is calculated for a disordered metal with a small concentration of superconductive grains. Above the macroscopic superconducting transition line, when electrons in the metal are normal, Andreev reflection from the grains leads to a nearly temperature-independent contribution to the dephasing rate. In a broad temperature range tau(-1)(phi)(T) strongly exceeds the prediction of the classical theory of dephasing in normal disordered conductors, whereas magnetoresistance is dominated (in two dimensions) by the Maki-Tompson correction and is positive.
authors.affiliation: L. D. Landau Institute for Theoretical Physics, Moscow 119334, Russia. skvor@itp.ac.ru
authors.forename: M A
authors.initials: MA
authors.lastname: Skvortsov
authors.forename: A I
authors.initials: AI
authors.lastname: Larkin
authors.forename: M V
authors.initials: MV
authors.lastname: Feigel'man