Theory of the Bloch oscillating transistor

Juha Hassel (Corresponding Author), Heikki Seppä

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    The Bloch oscillating transistor (BOT) is a device in which single electron current through a normal tunnel junction enhances Cooper pair current in a mesoscopic Josephson junction, leading to signal amplification. In this article we develop a theory in which the BOT dynamics is described as a two-level system. The theory is used to predict current–voltage characteristics and small-signal response. The transition from stable operation into the hysteretic regime is studied. By identifying the two-level switching noise as the main source of fluctuations, the expressions for equivalent noise sources and the noise temperature are derived. The validity of the model is tested by comparing the results with simulations and experiments.
    Original languageEnglish
    Article number023904
    Number of pages6
    JournalJournal of Applied Physics
    Volume97
    Issue number2
    DOIs
    Publication statusPublished - 2005
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    transistors
    noise temperature
    tunnel junctions
    Josephson junctions
    electrons
    simulation

    Keywords

    • superconducting transistors
    • superconducting device noise
    • Josephson effect
    • Josephson junction
    • Cooper pairs
    • fluctuations in superconductors
    • electrical conductivity transitions

    Cite this

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    title = "Theory of the Bloch oscillating transistor",
    abstract = "The Bloch oscillating transistor (BOT) is a device in which single electron current through a normal tunnel junction enhances Cooper pair current in a mesoscopic Josephson junction, leading to signal amplification. In this article we develop a theory in which the BOT dynamics is described as a two-level system. The theory is used to predict current–voltage characteristics and small-signal response. The transition from stable operation into the hysteretic regime is studied. By identifying the two-level switching noise as the main source of fluctuations, the expressions for equivalent noise sources and the noise temperature are derived. The validity of the model is tested by comparing the results with simulations and experiments.",
    keywords = "superconducting transistors, superconducting device noise, Josephson effect, Josephson junction, Cooper pairs, fluctuations in superconductors, electrical conductivity transitions",
    author = "Juha Hassel and Heikki Sepp{\"a}",
    note = "Project code: T3SU00197",
    year = "2005",
    doi = "10.1063/1.1831553",
    language = "English",
    volume = "97",
    journal = "Journal of Applied Physics",
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    publisher = "American Institute of Physics AIP",
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    }

    Theory of the Bloch oscillating transistor. / Hassel, Juha (Corresponding Author); Seppä, Heikki.

    In: Journal of Applied Physics, Vol. 97, No. 2, 023904, 2005.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Theory of the Bloch oscillating transistor

    AU - Hassel, Juha

    AU - Seppä, Heikki

    N1 - Project code: T3SU00197

    PY - 2005

    Y1 - 2005

    N2 - The Bloch oscillating transistor (BOT) is a device in which single electron current through a normal tunnel junction enhances Cooper pair current in a mesoscopic Josephson junction, leading to signal amplification. In this article we develop a theory in which the BOT dynamics is described as a two-level system. The theory is used to predict current–voltage characteristics and small-signal response. The transition from stable operation into the hysteretic regime is studied. By identifying the two-level switching noise as the main source of fluctuations, the expressions for equivalent noise sources and the noise temperature are derived. The validity of the model is tested by comparing the results with simulations and experiments.

    AB - The Bloch oscillating transistor (BOT) is a device in which single electron current through a normal tunnel junction enhances Cooper pair current in a mesoscopic Josephson junction, leading to signal amplification. In this article we develop a theory in which the BOT dynamics is described as a two-level system. The theory is used to predict current–voltage characteristics and small-signal response. The transition from stable operation into the hysteretic regime is studied. By identifying the two-level switching noise as the main source of fluctuations, the expressions for equivalent noise sources and the noise temperature are derived. The validity of the model is tested by comparing the results with simulations and experiments.

    KW - superconducting transistors

    KW - superconducting device noise

    KW - Josephson effect

    KW - Josephson junction

    KW - Cooper pairs

    KW - fluctuations in superconductors

    KW - electrical conductivity transitions

    U2 - 10.1063/1.1831553

    DO - 10.1063/1.1831553

    M3 - Article

    VL - 97

    JO - Journal of Applied Physics

    JF - Journal of Applied Physics

    SN - 0021-8979

    IS - 2

    M1 - 023904

    ER -