Infrared conductivity of a d_{x^2-y^2}-wave superconductor with impurity and spin-fluctuation scattering

Details Infrared conductivity of a d_{x^2-y^2}-wave superconductor with impurity and spin-fluctuation scattering Infrared conductivity of a d_{x^2-y^2}-wave superconductor with impurity and spin-fluctuation scattering

1995-10-23

arxiv.org/abs/cond-mat/9510135v1

Physics

Condensed Matter

29 pages (11 tar-compressed-uuencoded Postscript figures), REVTeX 3.0 with epsf macros

Scientific paper

10.1103/PhysRevB.53.8575

Calculations are presented of the in-plane far-infrared conductivity of a d_{x^2-y^2}-wave superconductor, incorporating elastic scattering due to impurities and inelastic scattering due to spin fluctuations. The impurity scattering is modeled by short-range potential scattering with arbitrary phase shift, while scattering due to spin fluctuations is calculated within a weak-coupling Hubbard model picture. The conductivity is characterized by a low-temperature residual Drude feature whose height and weight are controlled by impurity scattering, as well as a broad peak centered at 4 Delta_0 arising from clean-limit inelastic processes. Results are in qualitative agreement with experiment despite missing spectral weight at high energies.

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