Combined potential and spin impurity scattering in cuprates

Details Combined potential and spin impurity scattering in cuprates Combined potential and spin impurity scattering in cuprates

2000-11-26

arxiv.org/abs/cond-mat/0011437v1

Physics

Condensed Matter

Superconductivity

5 pages, 3 tables, RevTex, to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.63.012503

We present a theory of combined nonmagnetic and magnetic impurity scattering in anisotropic superconductors accounting for the momentum-dependent impurity potential. Applying the model to the d-wave superconducting state, we obtain a quantitative agreement with the initial suppression of the critical temperature due to Zn and Ni substitutions as well as electron irradiation defects in the cuprates. We suggest, that the unequal pair-breaking effect of Zn and Ni may be related to a different nature of the magnetic moments induced by these impurities.

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