Effect of anisotropy on universal transport in unconventional superconductors

W. C. Wu; D. Branch; J. P. Carbotte

doi:10.1103/PhysRevB.58.3417

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Effect of anisotropy on universal transport in unconventional superconductors

W. C. Wu, D. Branch, J. P. Carbotte

DOI 10.1103/PhysRevB.58.3417 · Physical Review B

T1

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Abstract

We investigate the universal electronic transport for a mixed dx2−y2+s-wave superconductor in the presence of an anisotropic elliptical Fermi surface. Similar to the universal low-temperature transport predicted in a dx2−y2-wave superconductor with a circular Fermi surface, anisotropic universal features are found in the low-temperature microwave conductivity and thermal conductivity in the anisotropic system. The effects of anisotropy on the penetration depth, impurity induced Tc suppression, and the zero-frequency density of states are also considered. While a small amount of anisotropy can lead to a strong suppression of the effective scattering rate, and hence the density of states at zero frequency, experimental data suggest that large effects are restored by a negative s-component gap admixture.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBCO Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown