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Role of anisotropic impurity scattering in anisotropic superconductors

Grzegorz Haran·A. D. S. Nagi
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Abstract

A theory of nonmagnetic impurities in an anisotropic superconductor including the effect of anisotropic (momentum-dependent) impurity scattering is given. It is shown that for a strongly anisotropic scattering the reduction of the pair-breaking effect of the impurities is large. For a significant overlap between the anisotropy functions of the scattering potential and that of the pair potential and for a large amount of anisotropic scattering rate in impurity potential the superconductivity becomes robust vis a vis impurity concentration. The implications of our result for YBCO high-temperature superconductor are discussed.

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Grzegorz Haran, A. D. S. Nagi. 1996-09-21. Role of anisotropic impurity scattering in anisotropic superconductors. https://doi.org/10.1103/physrevb.54.15463

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