Scattering by impurity-induced order parameter ``holes'' in d-wave superconductors

Abstract

Nonmagnetic impurities in d-wave superconductors cause strong local suppressions of the order parameter. We investigate the observable effects of the scatterigng off such suppressions in bulk samples by treating the order parameter "hole" as a pointlike off-diagonal scatterer treated within a self-consistent t-matrix approximation. Strong scattering potentials lead to a finite-energy spectral feature in the d-wave "impurity band", the observable effects of which include enhanced low-temperature microwave power absorption and a stronger sensitivity of the London penetration depth to disorder than found previously in simpler ``dirty'' d-wave models.

5 pp. Revtex including 4 postscript figures, submitted to Phys. Rev. B

References in corpus (3)

• Universal Heat Conduction in YBa_2Cu_3O_6.9
• Nonlocal Effects on the Magnetic Penetration Depth in d-wave Superconductors
• Effect of spatial variations of superconducting gap on suppression of the transition temperature by impurities

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