Spatial Inhomogeneities in Disordered d-Wave Superconductors: Effect on Density of States and Superfluid Stiffness

Amit Ghosal; Mohit Randeria; Nandini Trivedi

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Spatial Inhomogeneities in Disordered d-Wave Superconductors: Effect on Density of States and Superfluid Stiffness

Amit Ghosal·Mohit Randeria·Nandini Trivedi

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Abstract

We study a short coherence length d-wave superconductor with finite density of unitary scatterers using the Bogoliubov-deGennes technique. We find that the low-energy density of states is reduced, the superfluid stiffness is significantly larger and off-diagonal long range order is more robust than the self-consistent T-matrix prediction. These results are a consequence of the inhomogeneous pairing amplitude in the ground state and of the low-lying excitations formed by hybridized impurity resonances. These features, with their nontrivial spatial structure, cannot be adequately described within the conventional T-matrix approach.

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Amit Ghosal, Mohit Randeria, Nandini Trivedi. 2000-04-27. Spatial Inhomogeneities in Disordered d-Wave Superconductors: Effect on Density of States and Superfluid Stiffness. https://arxiv.org/abs/cond-mat/0004481

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