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Josephson tunnel-junction electrode materials.

C J Kircher, M Murakami

    Science (New York, N.Y.)
    |May 23, 1980
    PubMed
    Summary
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    Superconducting Josephson devices show promise for ultrahigh-speed computers. Advances in lead-alloy thin-film materials have improved device reliability for integrated circuits operating near absolute zero.

    Area of Science:

    • Solid State Physics
    • Materials Science
    • Superconductivity

    Background:

    • Josephson superconducting devices offer potential for ultrahigh-speed computing.
    • Integrated circuits require materials with specific properties for operation near absolute zero.

    Purpose of the Study:

    • To explore superconducting metal properties essential for Josephson devices in integrated circuits.
    • To detail recent advancements in lead-alloy thin-film materials for improved Josephson device reliability.

    Main Methods:

    • Investigated properties of superconducting metals including Pb(0.84)In(0.12)Au(0.04) alloy, Nb, and Nb(3)Sn.
    • Examined thin-film materials and their impact on Josephson device performance.

    Main Results:

    Related Experiment Videos

    • Substantial improvements in lead-alloy Josephson device reliability were achieved.
    • Pb(0.84)In(0.12)Au(0.04) alloy, Nb, and Nb(3)Sn show promise for device fabrication.

    Conclusions:

    • Lead-alloy and niobium-based Josephson devices demonstrate significant potential for fabricating large-scale integrated circuits.
    • Further research into these materials can advance the development of superconducting computers.