Abstract
Calculations are presented of the in-plane far-infrared conductivity of a -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 arising from clean-limit inelastic processes. Results are in qualitative agreement with experiment despite missing spectral weight at high energies. © 1996 The American Physical Society.
- Received 16 October 1995
DOI:https://doi.org/10.1103/PhysRevB.53.8575
©1996 American Physical Society