On the Theory of "Odd"-Pairing Superconductors

1993/08/09 by E. Z. Kuchinskii, M. V. Sadovskii, M. A. Erkabaev
Physics and Astronomy · #cond-mat

paper · pdf

published as JETP 77 (1993) 692 · 17 pages, 6 figures available from authors, RevTeX, IEF-LTF 3-93

arxiv created 1993/08/09 · arxiv updated 2009/11/30

Abstract

We consider the model of superconducting pairing with the energy gap function which is odd over k-k_F. In this case superconductivity is possible even in the presence of an arbitrarily large point-like repulsion between electrons, which is attractive for the theory of high-temperature superconductors. We discuss mainly a model pairing interaction for which the BCS equations can be solved exactly, allowing the complete analysis of the interplay of the usual (``even'') and ``odd'' pairing, depending on the coupling constant. We also show that the normal impurities (disorder) lead to a rapid degradation of the ``odd'' pairing, which is even more rapid than in case of magnetic impurities in traditional superconductors.

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