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Details of disorder matter in 2D d-wave superconductors

W. A. Atkinson·P. J. Hirschfeld·A. H. MacDonald·K. Ziegler
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Abstract

We demonstrate that discrepancies between predicted low-energy quasiparticle properties in disordered 2D d-wave superconductors occur because of the unanticipated importance of disorder model details and normal-state particle-hole symmetry. This conclusion follows from numerically exact evaluations of the quasiparticle density-of-states predicted by the Bogoliubov-deGennes (BdG) mean field equations for both binary alloy and random site energy disorder models. For the realistic case, which is best described by a binary alloy model without particle-hole symmetry, we predict density-of-states suppression below an energy scale which appears to be correlated with the corresponding single-impurity resonance.

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W. A. Atkinson, P. J. Hirschfeld, A. H. MacDonald, K. Ziegler. 2000-05-28. Details of disorder matter in 2D d-wave superconductors. https://doi.org/10.1103/physrevlett.85.3926

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