title: Unconventional Disorder Effects in Correlated Superconductors.
abstract: We study the effects of disorder on unconventional superconductors in the presence of correlations, and explore a novel correlated disorder paradigm dominated by strong deviations from standard Abrikosov-Gor'kov theory due to generation of local bound states and cooperative impurity behavior driven by Coulomb interactions. Specifically we explain under which circumstances magnetic disorder acts as a strong poison destroying high-T_{c} superconductivity at the sub-1% level, and when nonmagnetic disorder, counterintuitively, hardly affects the unconventional superconducting state while concomitantly inducing an inhomogeneous full-volume magnetic phase. Recent experimental studies of Fe-based superconductors have discovered that such unusual disorder behavior seems to be indeed present in those systems.
authors.affiliation: Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark.
authors.forename: Maria N
authors.initials: MN
authors.lastname: Gastiasoro
authors.affiliation: CNR-IOM-Cagliari and Dipartimento di Fisica, Università di Cagliari, 09042 Monserrato, Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Bernardini
authors.affiliation: Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark.
authors.forename: Brian M
authors.initials: BM
authors.lastname: Andersen