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Frustrated kinetic energy, the optical sum rule, and the mechanism of superconductivity

Sudip Chakravarty, Hae-Young Kee, Elihu Abrahams

cond-mat.supr-conarXiv:cond-mat/9811082

Abstract

The theory that the change of the electronic kinetic energy in a direction perpendicular to the CuO-planes in high-temperature superconductors is a substantial fraction of the condensation energy is examined. It is argued that the consequences of this theory based on a rigorous c-axis conductivity sum rule are consistent with recent optical and penetration depth measurements.

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