Impurities and Conductivity in a D-wave Superconductor
نویسنده
چکیده
Impurity scattering in the unitary limit produces low energy quasiparticles with anisotropic spectrum in a two-dimensional d-wave superconductor. We describe a new quasi-one-dimensional limit of the quasiparticle scattering, which might occur in a superconductor with short coherence length and with finite impurity potential range. The dc conductivity in a d-wave superconductor is predicted to be proportional to the normal state scattering rate and is impurity-dependent. We show that quasi-one-dimensional regime might occur in high-Tc superconductors with Zn impurities at low temperatures T ∼ 10 K. PACS Nos. 74.25.Fy; 71.55.Jv; 74.20.Mn Typeset using REVTEX Paper presented at the Los Alamos Conference on Strongly Correlated Electron Systems, December 1993
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