Unconventional Disorder Effects in Correlated Superconductors

Maria N. Gastiasoro, Fabio Bernardini, Brian M. Andersen

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20 Scopus citations

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-Tc 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.

Original languageEnglish (US)
Article number257002
JournalPhysical review letters
Volume117
Issue number25
DOIs
StatePublished - Dec 15 2016

Bibliographical note

Publisher Copyright:
© 2016 American Physical Society.

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