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

Abstract

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.

arXiv comment6 pages, 1 figure. to be published in Phys. Rev. B

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• Charge trapping and super-Poissonian noise centers in a cuprate high-temperature superconductor
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• The significance of "stripes" in the physics of the cuprates, the Hubbard model, and other highly correlated electronic systems