Nonlinear σ model for disordered superconductors

I.V. Yurkevich, Igor V. Lerner

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We suggest a variant of the nonlinear σ model for the description of disordered superconductors. The main distinction from existing models lies in the fact that the saddle point equation is solved nonperturbatively in the superconducting pairing field. It allows one to use the model both in the vicinity of the metal-superconductor transition and well below its critical temperature with full account for the self-consistency conditions. We show that the model reproduces a set of known results in different limiting cases, and apply it for a self-consistent description of the proximity effect at the superconductor-metal interface.
Original languageEnglish
Article number64522
Number of pages8
JournalPhysical Review B
Issue number6
Publication statusPublished - 24 Jan 2001

Bibliographical note

©2001 American Physical Society


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