Superconducting transition temperature of niobium/graphite bilayers

Toshiharu Kubo, Yoshiko F. Ohashi, Takeshi Kinoshita

    研究成果: Article

    4 引用 (Scopus)

    抜粋

    The superconducting proximity effect in niobium/graphite bilayers was studied. Thin graphite films of various thickness ranging from around 20-160 nm were prepared by cleaving a kish graphite (KG). For making a specimen, niobium (Nb) of 40 nm in thickness was deposited on a KG film and a quartz glass substrate simultaneously using electron-beam evaporation method. Each resistance of Nb and Nb/KG films was measured at the same time, and transition temperature of Nb film (TSC) and Nb/KG film (T* C) on the same substrate was obtained. The ratio of T* C to TSC (T*C/T SC) showed a periodic characteristic with KG film thickness. Furthermore, the peak values of the ratio exceeded 1.00. This result suggests that the electron correlation at Nb/KG interface changes depending on KG film thickness because of the interference of electrons as wave in the KG film.

    元の言語English
    ページ(範囲)58-62
    ページ数5
    ジャーナルPhysica C: Superconductivity and its applications
    417
    発行部数1-2
    DOI
    出版物ステータスPublished - 2004 12 15

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

    フィンガープリント Superconducting transition temperature of niobium/graphite bilayers' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用