Pramana

, Volume 64, Issue 6, pp 1039–1049 | Cite as

Keldysh proximity action for disordered superconductors

  • M V Feigel’man
  • A I Larkin
  • M A Skvortsov
Article

Abstract

We review a novel approach to the superconductive proximity effect in disordered normal-superconducting (N-S) structures. The method is based on the multicharge Keldysh action and is suitable for the treatment of interaction and fluctuation effects. As an application of the formalism, we study the subgap conductance and noise in two-dimensional N-S systems in the presence of the electron-electron interaction in the Cooper channel. It is shown that singular nature of the interaction correction at large scales leads to a nonmonotonuos temperature, voltage and magnetic field dependence of the Andreev conductance.

Keywords

Superconductivity nanostructures noise 

PACS Nos

74.45.+c 74.78.Na 73.50.Bk 

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Copyright information

© Indian Academy of Sciences 2005

Authors and Affiliations

  • M V Feigel’man
    • 1
  • A I Larkin
    • 1
  • M A Skvortsov
    • 1
  1. 1.L. D. Landau Institute for Theoretical PhysicsMoscowRussia

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