Strong correlations generically protect d-wave superconductivity against disorder
Shao Tang, V. Dobrosavljević, E. Miranda
DOI 10.1103/PhysRevB.93.195109 · Physical Review B
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Abstract
We address the question of why strongly correlated d-wave superconductors, such as the cuprates, prove to be surprisingly robust against the introduction of nonmagnetic impurities. We show that, very generally, both the pair-breaking and the normal state transport scattering rates are significantly suppressed by strong correlations effects arising in the proximity to a Mott insulating state. We also show that the correlation-renormalized scattering amplitude is generically enhanced in the forward direction, an effect which was previously often ascribed to the specific scattering by charged impurities outside the copper-oxide planes.
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