Do electrons change their c-axis kinetic energy upon entering the superconducting state?

Details Do electrons change their c-axis kinetic energy upon entering the superconducting state? Do electrons change their c-axis kinetic energy upon entering the superconducting state?

1998-01-05

arxiv.org/abs/cond-mat/9801025v2

Euro. Phys. J. B5, 337 (1998).

Physics

Condensed Matter

Superconductivity

A few typos are corrected and the footnote 11 expanded

Scientific paper

10.1007/s100510050451

The interlayer tunneling mechanism of the cuprate high temperature superconductors involves a conversion of the confinement kinetic energy of the electrons perpendicular to the CuO-planes ($c$-axis) in the normal state to the pair binding energy in the superconducting state. This mechanism is discussed and the arguments are presented from the point of view of general principles. It is shown that recent measurements of the $c$-axis properties support the idea that the electrons substantially lower their $c$-axis kinetic energy upon entering the superconducting state, a change that is nearly impossible in any conventional mechanism. The proper use of a $c$-axis conductivity sum rule is shown to resolve puzzles involving the penetration depth and the optical measurements.

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