Physics – Condensed Matter – Superconductivity
Scientific paper
1998-09-30
Phys. Rev. B 58, 3417 (1998)
Physics
Condensed Matter
Superconductivity
8 pages
Scientific paper
10.1103/PhysRevB.58.3417
We investigate the universal electronic transport for a mixed $d_{x^2-y^2}$+s-wave superconductor in the presence of an anisotropic elliptical Fermi surface. Similar to the universal low-temperature transport predicted in a $d_{x^2-y^2}$-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 $T_c$ 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 suggests that large effects are restored by a negative $s$-component gap admixture.
Branch David
Carbotte Jules P.
Wu Way-Chen
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