Effect of impurity scattering on a (d+s)-wave superconductor

Heesang Kim; E. J. Nicol

doi:10.1103/PhysRevB.52.13576

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Effect of impurity scattering on a (d+s)-wave superconductor

Heesang Kim, E. J. Nicol

DOI 10.1103/PhysRevB.52.13576 · Physical Review B

T1

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Abstract

Recent measurements of the surface impedance in YBa2Cu3O7−δ single crystals show large in-plane anisotropy which implies that orthorhombicity due to the Cu-O chains is not small. In addition, the controversy between the d-wave and the s-wave order parameter persists. In the framework of the orthorhombic symmetry, an order parameter with (d+s)-wave symmetry is considered in an attempt to understand current experimental results. We provide a detailed study of the characteristics of such an order parameter in the low-temperature behavior of the penetration depth, the density of states, and the Tc suppression in the presence of nonmagnetic impurity scattering. The results are discussed in comparison with the d-wave and the anisotropic s-wave cases.

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