New type of surface atomic vibrational modes of the (100) surface of the NaCl-type lattice

C. Oshima*

*この研究の対応する著者

    研究成果: Article査読

    3 被引用数 (Scopus)

    抄録

    On the basis of a lattice-dynamical calculation using the nearest-neighbor force-constant model of a 15-layer slab, we have discussed the optical and acoustical surface phonons of the (100) surface of the NaCl-type lattice. The stiffening of the in-plane force constant of the outermost layer has caused drastic changes of the surface phonon modes associated with the parallel vibrations to the surface. Instead of Lucas modes, the stiffening of 20% results in a new type of surface vibrational modes, which explains qualitatively the recent experimental dispersion curves of the longitudinal surface phonons of the TaC(100) and NbC(100) surfaces.

    本文言語English
    ページ(範囲)2949-2951
    ページ数3
    ジャーナルPhysical Review B
    34
    4
    DOI
    出版ステータスPublished - 1986

    ASJC Scopus subject areas

    • 凝縮系物理学

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