title: Tail states in a superconductor with magnetic impurities
abstract: A field theoretic approach is developed to investigate the profile and spectrum of subgap states in a superconductor subject to a weak magnetic impurity potential. Such states are found to be associated with spatially inhomogeneous instanton configurations of the action.
authors.affiliation: Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, United Kingdom.
authors.initials: A
authors.lastname: Lamacraft
authors.initials: BD
authors.lastname: Simons