Impurity scattering in anisotropic superconductors and interband sign reversal of the order parameter

Igor I. Mazin; A. A. Golubov

doi:10.1117/12.241762

10 June 1996 Impurity scattering in anisotropic superconductors and interband sign reversal of the order parameter

Igor I. Mazin, A. A. Golubov

Proceedings Volume 2696, Spectroscopic Studies of Superconductors; (1996) https://doi.org/10.1117/12.241762
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

We discuss various mechanisms that can lead to interband sign reversal of the order parameter in a multi-band superconductor. In particular, we generalize Abrikosov-Gor'kov solution of the problem of weakly coupled superconductor with magnetic and nonmagnetic impurities on the case of arbitrary order parameter anisotropy, including extreme cases as d-pairing or interband sign reversal of the order parameter, and show that interband scattering by magnetic impurities can stabilize an interband sign-reversal state. We discuss a possibility of such state in YBa₂Cu₃O₇ in the context of various experiments: Josephson tunneling, neutron scattering, isotope effect measurements.

Citation Download Citation

Igor I. Mazin and A. A. Golubov "Impurity scattering in anisotropic superconductors and interband sign reversal of the order parameter", Proc. SPIE 2696, Spectroscopic Studies of Superconductors, (10 June 1996); https://doi.org/10.1117/12.241762

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