Impurities and Quasi-One Dimensional Transport in a D-wave Superconductor
arXiv:cond-mat/9311004 · doi:10.1103/PhysRevLett.73.720
Abstract
Impurity scattering in the unitary limit produces low energy quasiparticles with anisotropic spectrum in a two-dimensional -wave superconductor. We describe a new {\em quasi-one-dimensional } limit of the quasiparticle scattering, which might occur in a superconductor with short coherence length and with {\em finite} impurity potential range. The dc conductivity in a -wave superconductor is predicted to be proportional to the normal state scattering rate and is impurity-{\em dependent}. We show that the {\em quasi-one-dimensional } regime occurs in high- superconductors at low temperatures ~K. We argue that the impurities produce weak localization, in the {\em orthogonal } universality class, of the quasiparticles in a -wave superconductor.
12 pages, 1 fig, LA-UR-93-3621
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Cited by in corpus (22)
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