Surface-phonon dispersion curves of TiC(100)

C. Oshima, T. Aizawa, M. Wuttig, R. Souda, S. Otani, Y. Ishizawa, H. Ishida, K. Terakura

    研究成果: Article

    32 引用 (Scopus)

    抜粋

    The surface-phonon dispersion curves of the TiC(100) surface along both the M and X azimuths of the two-dimensional Brillouin zone have been measured by electron-energy-loss spectroscopy (EELS). We have observed two acoustical-phonon branches (Rayleigh and resonance modes) and three optical-phonon branches (Wallis, Lucas, and new modes). Those experimental curves are in good agreement with the theoretical ones calculated on the basis of a screened-shell model. In this calculation, the 20% stiffening of the stretching force constant between the first-layer Ti atom and the second-layer carbon produces a quasitransverse mode localized strongly at the second-layer carbon, which corresponds to the new observed surface mode. The local spectral densities calculated with use of these parameters have been compared with the experimental EELS spectra.

    元の言語English
    ページ(範囲)7510-7517
    ページ数8
    ジャーナルPhysical Review B
    36
    発行部数14
    DOI
    出版物ステータスPublished - 1987

    ASJC Scopus subject areas

    • Condensed Matter Physics

    フィンガープリント Surface-phonon dispersion curves of TiC(100)' 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

    Oshima, C., Aizawa, T., Wuttig, M., Souda, R., Otani, S., Ishizawa, Y., Ishida, H., & Terakura, K. (1987). Surface-phonon dispersion curves of TiC(100). Physical Review B, 36(14), 7510-7517. https://doi.org/10.1103/PhysRevB.36.7510