Kondo effect in d-wave superconductors

Abstract

We present theoretical investigation of a single magnetic impurity in a d-wave superconductor using the large N limit. It is shown that the Kondo screening occurs only in the presence of the particle-hole asymmetry. We find analytical expressions for the Kondo temperature, magnetic susceptibility and scattering matrix near the phase transition. The results are generalized for the density of states vanishing with an arbitrary exponent. Also we briefly study the modifications of the theory for the case of a non-magnetic impurity which induces a staggered spin configuration on the nearby copper atoms.

10 pages, 4 figures

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