Nonequilibrium interpretation of DC properties of NbN superconducting hot electron bolometers

M. Shcherbatenko, I. Tretyakov, Yu Lobanov, S. N. Maslennikov, N. Kaurova, M. Finkel, B. Voronov, G. Goltsman, T. M. Klapwijk

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    12 Citations (Scopus)
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    Abstract

    We present a physically consistent interpretation of the dc electrical properties of niobiumnitride (NbN)-based superconducting hot-electron bolometer mixers, using concepts of nonequilibrium superconductivity. Through this, we clarify what physical information can be extracted from the resistive transition and the dc current-voltage characteristics, measured at suitably chosen temperatures, and relevant for device characterization and optimization. We point out that the intrinsic spatial variation of the electronic properties of disordered superconductors, such as NbN, leads to a variation from device to device.

    Original languageEnglish
    Article number132602
    Pages (from-to)1-5
    Number of pages5
    JournalApplied Physics Letters
    Volume109
    Issue number13
    DOIs
    Publication statusPublished - 26 Sep 2016

    Keywords

    • Superconductors
    • Gold
    • Electrical resistivity
    • Coherence
    • Bolometers

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