Details of disorder matter in 2D d-wave superconductors
Within numerically exact solutions of the Bogoliubov-de Gennes equations, 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. For the realistic case, which is best described by a binary alloy model without particle-hole symmetry, we predict density-of-state suppression below an energy scale which appears to be correlated with the corresponding single impurity resonance.
Atkinson
WA
Department of Physics, University of Florida, P.O. Box 118440, Gainesville, Florida 32611, USA.
Hirschfeld
PJ
MacDonald
AH
Ziegler
K