Static charge-imbalance effects in intrinsic Josephson systems

Details Static charge-imbalance effects in intrinsic Josephson systems Static charge-imbalance effects in intrinsic Josephson systems

2004-07-26

arxiv.org/abs/cond-mat/0407660v1

Physics

Condensed Matter

Superconductivity

14 pages, 10 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.71.054507

Nonequilibrium effects created by stationary current injection in layered d-wave superconductors forming a stack of intrinsic Josephson junctions are studied. Starting from a nonequilibrium Green function theory we derive microscopic expressions for the charge-imbalance (difference between electron- and hole-like quasi-particles) on the superconducting layers and investigate its influence on the quasi-particle current between the layers. This nonequilibrium effect leads to shifts in the current-voltage curves of the stack. The theory is applied to the interpretation of recent current injection experiments in double-mesa structures.

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