Unusual mechanism of vortex viscosity generated by mixed normal modes in superconductors with broken time reversal symmetry
Abstract
We show that under certain conditions multiband superconductors with broken time-reversal symmetry have a new vortex viscosity-generating mechanism which is different from that in conventional superconductors. It appears due to the existence of mixed superfluid phase-density mode inside vortex core. This new contribution is dominant near the time reversal symmetry breaking phase transition. The results could be relevant for three band superconductor Ba1-xKxFe2As2.
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