Superconductivity, phase fluctuations and the c-axis conductivity of bilayer high temperature superconductors

Details Superconductivity, phase fluctuations and the c-axis conductivity of bilayer high temperature superconductors Superconductivity, phase fluctuations and the c-axis conductivity of bilayer high temperature superconductors

2001-06-28

arxiv.org/abs/cond-mat/0106610v1

Phys. Rev. B 65, 024506 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 14 figures

Scientific paper

10.1103/PhysRevB.65.024506

We present a theory of the interplane conductivity of bilayer high temperature superconductors, focusing on the effect of quantal and thermal fluctuations on the oscillator strengths of the superfluid stiffness and the bilayer plasmon. We find that the opening of the superconducting gap and establishment of superconducting phase coherence each lead to redistribution of spectral weight over wide energy scales. The factor-of-two relation between the superfluid stiffness and the change below $T_c$ in the oscillator strength of the absorptive part of the conductivity previously derived for single-layer systems, is found to be substantially modified in bilayer systems.

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