Abstract
Using the approach of Matsuura, Ichinose, and Nagaoka to treat Anderson impurities dissolved in a transition metal superconductor, the Kondo effect in a two-band superconductor is studied. It is found that the two-particle propagators for the superconductor are coupled to each other through thes- andd-electron vertex functions, which are obtained as solutions to a set of coupled Bethe-Salpeter equations. By rearranging some of the terms in the two-particle propagators, the pair-breaking parameters for thes andd electrons are obtained. An expression for the decrease in the transition temperature due to the Kondo scattering is obtained.
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Tang, I.M., Roongkeadsakoon, S. Anderson impurities in a transition metal superconductor. Kondo effect. J Low Temp Phys 55, 411–428 (1984). https://doi.org/10.1007/BF00681772
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DOI: https://doi.org/10.1007/BF00681772