Details of disorder matter in 2D d-wave superconductors

Details Details of disorder matter in 2D d-wave superconductors Details of disorder matter in 2D d-wave superconductors

2000-05-28

arxiv.org/abs/cond-mat/0005487v1

Physical Review Letters 85, 3926-3929 (2000)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.85.3926

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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