Proximity Action theory of superconductive nanostructures

M.A. Skvortsov^a, A.I. Larkin^a, b, M.V. Feigel’man^a
^aLandau Institute for Theoretical Physics, Russian Academy of Sciences, prosp. Akademika Semenova 1A, Chernogolovka, Moscow Region, 142432, Russian Federation
^bWilliam I. Fine Theoretical Physics Institute, University of Minnesota, Minnesota, Minnesota , United States of America

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.

PACS: 74.20.−z, 74.70.−b, 74.80.-g, 03.65.Ud (all)
DOI: 10.1070/1063-7869/44/10S/S17
URL: https://ufn.ru/en/articles/2001/13/q/
Citation: Skvortsov M A, Larkin A I, Feigel’man M V "Proximity Action theory of superconductive nanostructures" Phys. Usp. 44 76–80 (2001)

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Оригинал: Skvortsov M A, Larkin A I, Feigel’man M V «Proximity Action theory of superconductive nanostructures» УФН 171 76–80 (2001); DOI: 10.1070/1063-7869/44/10S/S17

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