Surface phonons of the superconducting materials NbC(100) and TaC(100)

C. Oshima, R. Souda, M. Aono, S. Otani, Y. Ishizawa

    研究成果: Article査読

    24 被引用数 (Scopus)

    抄録

    The dispersion curves of both the optical and acoustical surface phonons in the superconducting compounds NbC(100) and TaC(100) have been determined over the entire Brillouin zone of the M symmetry axis by use of angle-resolved high-resolution electron-energy-loss spectroscopy. In contrast to the bulk phonon, no anomalies (dip) due to the electron-phonon coupling in the dispersion curves of the longitudinal phonon have been found at these surfaces. Conversely, the in-plane force constant between carbon and metal atoms is strongly enhanced there.

    本文言語English
    ページ(範囲)240-243
    ページ数4
    ジャーナルPhysical Review Letters
    56
    3
    DOI
    出版ステータスPublished - 1986

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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