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24 April 2024

» arxiv » 1308.6459

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Averaging over disorder in a case of retarded interaction of metal's quasiparticles with impurities and generalization of Eliashberg equations
K.V. Grigorishin ;
Date:	29 Aug 2013
Abstract:	A perturbation theory and a diagram technique for a disordered metal are proposed when scattering of quasiparticles by nonmagnetic impurities is caused with a retarded interaction. Eliashberg equations for s-wave superconductivity are generalized for such a disordered superconductor. It is shown that in this case Anderson theorem is violated in the sense that embedding of the impurities into s-wave superconductor increases its critical temperature. The amplification of superconductive properties is a result of dynamics effects in the scattering by the impurity.
Source:	arXiv, 1308.6459
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