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

S. M. Quinlan; P. J. Hirschfeld; D. J. Scalapino

doi:10.1103/physrevb.53.8575

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arXiv · cond-mat/9510135

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

S. M. Quinlan·P. J. Hirschfeld·D. J. Scalapino

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Abstract

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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S. M. Quinlan, P. J. Hirschfeld, D. J. Scalapino. 1995-10-23. Infrared conductivity of a d_{x^2-y^2}-wave superconductor with impurity and spin-fluctuation scattering. https://doi.org/10.1103/physrevb.53.8575

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