Coherent potential approximation for d-wave superconductivity in disordered systems
A. M. Martin, G. Litak, B. L. Györffy, J. F. Annett, K. I. Wysokiński
DOI 10.1103/PhysRevB.60.7523 · Physical Review B
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Abstract
A coherent-potential approximation CPA is developed for s-wave and d-wave superconductivity in disordered systems. We show that the CPA formalism reproduces the standard pair breaking formula, the self-consistent Born approximation and the self-consistent T-matrix approximation in the appropriate limits. We implement the theory and compute Tc for s-wave and d-wave pairing using an attractive nearest-neighbor Hubbard model featuring both binary-alloy disorder and a uniform distribution of scattering site potentials. We determine the density of states and examine its consequences for low-temperature heat capacity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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