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Coupling of intrinsic Josephson oscillations in layered superconductors by charge fluctuations

Ch. Preis·Ch. Helm·J. Keller·A. Sergeev·R. Kleiner
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Abstract

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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Ch. Preis, Ch. Helm, J. Keller, A. Sergeev, R. Kleiner. 1998-10-16. Coupling of intrinsic Josephson oscillations in layered superconductors by charge fluctuations. https://doi.org/10.1117/12.332438

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