Electromagnetic response of superconductors and optical sum rule

Abstract

The interrelation between the condensation energy and the optical sum rules has been investigated. It has been shown that the so called 'partial' sum rule violation is related mainly to a temperature dependence of the relaxation rate rather than to the appearance of superconductivity itself. Moreover, we demonstrate that the experimental data on the temperature dependence of the optical sum rule can be explained rather well by an account of strong electron-phonon interaction.

16 pages, 1 figure. Submitted to Solid State Communications

References in corpus (2)

• Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors
• Quasiparticle Formation and Optical Sum Rule Violation in Cuprate Superconductors

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