Enhancement of Josephson quasiparticle current in coupled superconducting single-electron transistors

D. C. Dixon; C. P. Heij; P. Hadley; J. E. Mooij

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arXiv · cond-mat/9909442

Enhancement of Josephson quasiparticle current in coupled superconducting single-electron transistors

D. C. Dixon·C. P. Heij·P. Hadley·J. E. Mooij

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Abstract

The Josephson quasiparticle (JQP) cycle in a voltage-biased superconducting single-electron transistor (SSET) combines coherent Cooper pair tunneling with incoherent quasiparticle decay. We have measured the influence of current flow through an independently-biased SSET on the JQP cycle when the two SSET's have a strong mutual capacitive coupling. We find, among other effects, that the JQP current in one SSET is enhanced by the presence of a quasiparticle current in the other SSET. A simplified model of the coupled-SSET system is presented which reproduces the enhancement effect.

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D. C. Dixon, C. P. Heij, P. Hadley, J. E. Mooij. 1999-09-30. Enhancement of Josephson quasiparticle current in coupled superconducting single-electron transistors. https://arxiv.org/abs/cond-mat/9909442

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