Effect of Born and unitary impurity scattering on the Kramer-Pesch shrinkage of a vortex core in a chiral p-wave superconductor

We theoretically investigate a non-magnetic impurity effect on the temperature dependence of the vortex core shrinkage (Kramer-Pesch effect) in a chiral p-wave superconductor. The Born limit and the unitary limit scattering are compared within the framework of the quasiclassical theory of superconductivity. We find that the robustness of the Kramer-Pesch effect against the impurity scattering in the Born limit is lost in the unitary limit.