Calculation of overdamped c-axis charge dynamics and the coupling to polar phonons in cuprate superconductors

Details Calculation of overdamped c-axis charge dynamics and the coupling to polar phonons in cuprate superconductors Calculation of overdamped c-axis charge dynamics and the coupling to polar phonons in cuprate superconductors

2006-10-04

arxiv.org/abs/cond-mat/0610129v1

Phys. Rev. B 74, 174524 (2006)

Physics

Condensed Matter

Superconductivity

6 pages, 1 figure. to be published in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.74.174524

In our recent paper we presented empirical evidences suggesting that electrons in cuprate superconductors are strongly coupled to unscreened c-axis polar phonons. In the overdoped regime the c-axis metallizes and we present here simple theoretical arguments demonstrating that the observed effect of the metallic c-axis screening on the polar electron-phonon coupling is consistent with a strongly overdamped c-axis charge dynamics in the optimally doped system, becoming less dissipative in the overdoped regime.

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