Impurities in "Odd-Pairing" Superconductors

Details Impurities in "Odd-Pairing" Superconductors Impurities in "Odd-Pairing" Superconductors

1993-03-19

arxiv.org/abs/cond-mat/9303032v2

JETP Letters 57 (1993) 515

Physics

Condensed Matter

6 pp.(revtex), two figures are available from the authors, IEF-LTF 1-93

Scientific paper

We present the results of theoretical analysis of normal impurities effects in superconductors with the gap being an odd function of k-k_{F}. This model proposed by Mila and Abrahams leads to the possibility of pairing in the presence of arbitrarily strong short-range repulsion between electrons and may be applied to high-Tc oxides.However, we demonstrate that normal impurities lead to rather strong suppression of this type of pairing, which is actually stronger than in the case of magnetic impurities in traditional superconductors. Relative stability of high-Tc cuprates to disordering makes this model a rather unlikely candidate for the pairing mechanism in these systems.

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