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 |
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ページ(範囲) | 240-243 |
ページ数 | 4 |
ジャーナル | Physical Review Letters |
巻 | 56 |
号 | 3 |
DOI | |
出版ステータス | Published - 1986 |
ASJC Scopus subject areas
- 物理学および天文学(全般)