Evidence for universality of tunable-barrier electron pumps

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Giblin, Stephen P. and Fujiwara, Akira and Yamahata, Gento and Bae, Myung-Ho and Kim, Nam and Rossi, Alessandro and Möttönen, Mikko and Kataoka, Masaya (2019) Evidence for universality of tunable-barrier electron pumps. Metrologia, 56 (4). 044004. ISSN 1681-7575 (https://doi.org/10.1088/1681-7575/ab29a5)

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Abstract

We review recent precision measurements on semiconductor tunable-barrier electron pumps operating in a ratchet mode. Seven studies on five different designs of pumps have reported measurements of the pump current with relative total uncertainties around 10-6 or less. Combined with theoretical models of electron capture by the pumps, these experimental data exhibits encouraging evidence that the pumps operate according to a universal mechanism, independent of the details of device design. Evidence for robustness of the pump current against changes in the control parameters is at a more preliminary stage, but also encouraging, with two studies reporting robustness of the pump current against three or more parameters in the range of ∼5 × 10-7 to ∼2 × 10-6. This review highlights the need for an agreed protocol for tuning the electron pump for optimal operation, as well as more rigorous evaluations of the robustness in a wide range of pump designs.

ORCID iDs

Giblin, Stephen P., Fujiwara, Akira, Yamahata, Gento, Bae, Myung-Ho, Kim, Nam, Rossi, Alessandro ORCID logoORCID: https://orcid.org/0000-0001-7935-7560, Möttönen, Mikko and Kataoka, Masaya;
  • Item type:Article
    ID code:69532
    Dates:
    Date
    Event
    2 July 2019
    Published
    13 June 2019
    Published Online
    13 June 2019
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:29 Aug 2019 12:42
    Last modified:04 Dec 2024 02:14
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/69532
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