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Charge-imbalance effects in intrinsic Josephson systems

S. Rother·Y. Koval·P. Muller·R. Kleiner·D. A. Ryndyk·J. Keller·C. Helm
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Abstract

We report on two types of experiments with intrinsic Josephson systems made from layered superconductors which show clear evidence of nonequilibrium effects: 1. In 2-point measurements of IV-curves in the presence of high- frequency radiation a shift of the voltage of Shapiro steps from the canonical value hf/(2e) has been observed. 2. In the IV-curves of double-mesa structures an influence of the current through one mesa on the voltage measured on the other mesa is detected. Both effects can be explained by charge-imbalance on the superconducting layers produced by the quasi-particle current, and can be described successfully by a recently developed theory of nonequilibrium effects in intrinsic Josephson systems.

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S. Rother, Y. Koval, P. Muller, R. Kleiner, D. A. Ryndyk, J. Keller, C. Helm. 2002-07-26. Charge-imbalance effects in intrinsic Josephson systems. https://doi.org/10.1103/physrevb.67.024510

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