Plasma resonance and remaining Josephson coupling in the ``decoupled vortex liquid phase'' in layered superconductors

Abstract

We relate the frequency of the plasma resonance in layered superconductors with the frequency dependent superconducting response along the c-direction. We demonstrate that the sharp resonance can persist even when the global superconducting coherence in this direction is absent provided the resonance frequency is larger than the typical frequency of interlayer phase slips. In this situation the plasma frequency is determined by the average Josephson energy, which can be calculated using the high temperature expansion. We also find the temperature dependence of the average Josephson energy from the Monte Carlo simulations of the uniformly frustrated XY model and determine the applicability region of the high temperature expansion. The field and temperature scaling of the plasma frequency suggested by the high temperature expansion is consistent with experiment.

slightly revised version, RevTeX, 4 pages, 2 Postscript figures

References in corpus (3)

• Mechanism of thermally activated c-axis dissipation in layered High-T${}_c$ superconductors at high fields
• Phase Transitions and Vortex Line Entanglement in a Model High Temperature Superconductor
• Plasma Resonance in Layered Normal Metals and Superconductors

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