Theory of optical conductivity in BCS superconductors
Hua Chen
DOI 10.1103/PhysRevLett.71.2304 · Physical Review Letters
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Abstract
The optical conductivity is obtained exactly within BCS theory as a function of frequency, temperature, and disorder parameter, by simplifying the general impurity scattering mechanism to backward scattering. The familiar features of infrared measurements are recovered. In the dirty limit, the ratio of superconducting to normal absorption rate approaches the Mattis-Bardeen result.
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