Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy

K. Ishizaka, R. Eguchi, S. Tsuda, T. Yokoya, A. Chainani, T. Kiss, T. Shimojima, T. Togashi, S. Watanabe, C. T. Chen, C. Q. Zhang, Y. Takano, M. Nagao, I. Sakaguchi, T. Takenouchi, Hiroshi Kawarada, S. Shin

    研究成果: Article

    35 引用 (Scopus)

    抄録

    We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear shift of the leading edge below T=11K, indicative of a superconducting gap opening (Δ∼0.78meV at T=4.5K). The gap feature is significantly broad and a well-defined quasiparticle peak is lacking even at the lowest temperature of measurement (=4.5K). We discuss our results in terms of disorder effects on the normal state transport and superconductivity in this system.

    元の言語English
    記事番号047003
    ジャーナルPhysical Review Letters
    98
    発行部数4
    DOI
    出版物ステータスPublished - 2007

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    boron
    photoelectric emission
    diamonds
    leading edges
    spectroscopy
    lasers
    superconductivity
    disorders
    electronic structure
    shift
    thin films
    temperature
    energy

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    これを引用

    Ishizaka, K., Eguchi, R., Tsuda, S., Yokoya, T., Chainani, A., Kiss, T., ... Shin, S. (2007). Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy. Physical Review Letters, 98(4), [047003]. https://doi.org/10.1103/PhysRevLett.98.047003

    Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy. / Ishizaka, K.; Eguchi, R.; Tsuda, S.; Yokoya, T.; Chainani, A.; Kiss, T.; Shimojima, T.; Togashi, T.; Watanabe, S.; Chen, C. T.; Zhang, C. Q.; Takano, Y.; Nagao, M.; Sakaguchi, I.; Takenouchi, T.; Kawarada, Hiroshi; Shin, S.

    :: Physical Review Letters, 巻 98, 番号 4, 047003, 2007.

    研究成果: Article

    Ishizaka, K, Eguchi, R, Tsuda, S, Yokoya, T, Chainani, A, Kiss, T, Shimojima, T, Togashi, T, Watanabe, S, Chen, CT, Zhang, CQ, Takano, Y, Nagao, M, Sakaguchi, I, Takenouchi, T, Kawarada, H & Shin, S 2007, 'Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy', Physical Review Letters, 巻. 98, 番号 4, 047003. https://doi.org/10.1103/PhysRevLett.98.047003
    Ishizaka, K. ; Eguchi, R. ; Tsuda, S. ; Yokoya, T. ; Chainani, A. ; Kiss, T. ; Shimojima, T. ; Togashi, T. ; Watanabe, S. ; Chen, C. T. ; Zhang, C. Q. ; Takano, Y. ; Nagao, M. ; Sakaguchi, I. ; Takenouchi, T. ; Kawarada, Hiroshi ; Shin, S. / Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy. :: Physical Review Letters. 2007 ; 巻 98, 番号 4.
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    abstract = "We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear shift of the leading edge below T=11K, indicative of a superconducting gap opening (Δ∼0.78meV at T=4.5K). The gap feature is significantly broad and a well-defined quasiparticle peak is lacking even at the lowest temperature of measurement (=4.5K). We discuss our results in terms of disorder effects on the normal state transport and superconductivity in this system.",
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    T1 - Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy

    AU - Ishizaka, K.

    AU - Eguchi, R.

    AU - Tsuda, S.

    AU - Yokoya, T.

    AU - Chainani, A.

    AU - Kiss, T.

    AU - Shimojima, T.

    AU - Togashi, T.

    AU - Watanabe, S.

    AU - Chen, C. T.

    AU - Zhang, C. Q.

    AU - Takano, Y.

    AU - Nagao, M.

    AU - Sakaguchi, I.

    AU - Takenouchi, T.

    AU - Kawarada, Hiroshi

    AU - Shin, S.

    PY - 2007

    Y1 - 2007

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    AB - We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear shift of the leading edge below T=11K, indicative of a superconducting gap opening (Δ∼0.78meV at T=4.5K). The gap feature is significantly broad and a well-defined quasiparticle peak is lacking even at the lowest temperature of measurement (=4.5K). We discuss our results in terms of disorder effects on the normal state transport and superconductivity in this system.

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