1994/09/06 by E. Z. Kuchinskii, A. I. Posazhennikova, M. V. Sadovskii
Physics and Astronomy · #cond-mat
published as JETP 80 (1995) 324 · 19 pages + 11 Figures, 8 Postscript Figures included, RevTeX 3.0, IEF-LTF 94-01
arxiv created 1994/09/06 · arxiv updated 2009/11/30
Ginzburg-Landau expansion is derived for superconductors with the gap-function odd over k-kF. It is shown that in this odd-gap case Ginzburg-Landau coefficients possess an additional dependence on the pairing coupling constant which leads to the appropriate dependence of the physical properties. Non-magnetic impurities influence the odd-gap pairing in a significant way and the mechanism of this influence is quite different from that predicted by the usual theory of "dirty" superconductors. In particular this is reflected in an anomalous behavior of the upper critical field Hc2 slope close to Tc. We also derive the complete temperature dependence of Hc2 for the odd-gap case.