Dephasing in Disordered Metals with Superconductive Grains

  • M. A. Skvortsov
  • A. I. Larkin
  • M. V. Feigel’man
Part of the NATO Science Series II: Mathematics, Physics and Chemistry book series (NAII, volume 154)

Abstract

Temperature dependence of electron dephasing time τϕ(T) is calculated for a disordered metal with 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 τϕ−1(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.

Key words

dephasing superconductive fluctuations 

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • M. A. Skvortsov
    • 1
  • A. I. Larkin
    • 2
    • 3
  • M. V. Feigel’man
    • 4
  1. 1.L. D. Landau Institute for Theoretical PhysicsMoscowRussia
  2. 2.L. D. Landau Institute for Theoretical PhysicsMoscowRussia
  3. 3.Department of PhysicsUniversity of MinnesotaMinneapolisUSA
  4. 4.L. D. Landau Institute for Theoretical PhysicsMoscowRussia

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