Weak anisotropic impurity scattering in unconventional superconductors

Details Weak anisotropic impurity scattering in unconventional superconductors Weak anisotropic impurity scattering in unconventional superconductors

1996-12-03

arxiv.org/abs/cond-mat/9612031v1

Solid State Commun. 101 (1997) 71-75

Physics

Condensed Matter

Superconductivity

12 pages, RevTeX, 3 PostScript figures

Scientific paper

10.1016/S0038-1098(96)00555-8

The effect of weak anisotropic (momentum-dependent) impurity scattering in unconventional superconductors has been investigated. It is shown that the anisotropic scattering can lead either to a small reduction or a small enhancement of the isotropic pair-breaking effect. The influence of the anisotropy of the scattering potential becomes significant for the order parameters with large Fermi surface average values. In that case an unexpected enhancement (up to 10%) of the critical temperature over the critical temperature in the absence of impurities is predicted for a small impurity concentration.

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