Role of anisotropic impurity scattering in anisotropic superconductors
- Department of Physics, University of Waterloo, Waterloo, Ontario, N2L 3G1 (CANADA)
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-{grave a}-vis impurity concentration. The implications of our result for YBCO high-temperature superconductor are discussed. The experimental data of electron irradiation-induced {ital T}{sub {ital c}} suppression [Phys. Rev. B {bold 50}, 15967 (1994)] are understood quantitatively and a good qualitative agreement with the ion (Ne{sup +}) damage and Pr substitution-induced {ital T}{sub {ital c}} decrease data [Phys. Rev. B {bold 50}, 3266 (1994)] is obtained. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 397623
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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