Pairing and Fermiology in iron-chalcogenide superconductors

COFFEE_KLATCH · Invited

Abstract

``Stripe''-type magnetic fluctuations has been postulated as the trigger of Cooper pairing in iron-based superconductors. In iron pnictides the matching of the peak magnetic fluctuations wavevector and the Fermiology lands support to the above idea. However recent ARPES results on high T$_{\mathrm{c}}$ A$_{\mathrm{x}}$Fe$_{\mathrm{2-y}}$Se$_{\mathrm{2}}$ and FeSe/SrTiO$_{\mathrm{3}}$ and neutron results on A$_{\mathrm{x}}$Fe$_{\mathrm{2-y}}$Se$_{\mathrm{2}}$ pose challenges to the above picture. In this talk we will take a fresh new look at the purported pairing mechanism of iron-based superconductors.

Authors

  • Dung-Hai Lee

    Dept. Physics, University of California, Berkeley