Overscreening of magnetic impurities in $d_{x^2-y^2}$ wave superconductors

Carlos R. Cassanello, Eduardo Fradkin

We consider the screening of a magnetic impurity in a $d_{x^2-y^2}$ wave superconductor. The properties of the $d_{x^2-y^2}$ state lead to an unusual behavior in the impurity magne…