Coupling of intrinsic Josephson oscillations in layered superconductors by charge fluctuations

Details Coupling of intrinsic Josephson oscillations in layered superconductors by charge fluctuations Coupling of intrinsic Josephson oscillations in layered superconductors by charge fluctuations

1998-10-16

arxiv.org/abs/cond-mat/9810192v1

Physics

Condensed Matter

Superconductivity

To be published in proceedings of SPIE conference San Diego 1998

Scientific paper

The coupling of Josephson oscillations in layered superconductors is studied with help of a tunneling Hamiltonian formalism. The general form of the current density across the barriers between the superconducting layers is derived. The induced charge fluctuations on the superconducting layers lead to a coupling of the Josephson oscillations in different junctions. A simplified set of equations is then used to study the non-linear dynamics of the system. In particular the influence of the coupling on the current-voltage characteristics is investigated and upper limits for the coupling strength are estimated from a comparison with experiments on cuprate superconductors.

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