Enhancement of Josephson Quasiparticle Current in Coupled Superconducting Single-electron Transistors

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

    Research output: Contribution to journalArticleResearchpeer-review

    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 a striking modification of the JQP process in a system of two SSET's having a large mutual capacitance. We find, among other effects, that the JQP current in one SSET may be enhanced by the presence of a quasiparticle current through the other SSET. A simplified model of the coupled-SSET system is presented which reproduces the enhancement effect.

    Original languageEnglish
    Pages (from-to)325-332
    Number of pages8
    JournalJournal of low temperature physics
    Volume118
    Issue number5-6
    Publication statusPublished - 2000

    Fingerprint

    Single electron transistors
    single electron transistors
    augmentation
    Capacitance
    capacitance
    cycles
    Electric potential
    electric potential
    decay

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

    Cite this

    Enhancement of Josephson Quasiparticle Current in Coupled Superconducting Single-electron Transistors. / Dixon, D. C.; Heij, C. P.; Hadley, P.; Mooij, J. E.

    In: Journal of low temperature physics, Vol. 118, No. 5-6, 2000, p. 325-332.

    Research output: Contribution to journalArticleResearchpeer-review

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    AB - 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 a striking modification of the JQP process in a system of two SSET's having a large mutual capacitance. We find, among other effects, that the JQP current in one SSET may be enhanced by the presence of a quasiparticle current through the other SSET. A simplified model of the coupled-SSET system is presented which reproduces the enhancement effect.

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