Vibrational modes of the K/Si(111)-(3 x 1) surface studied by high-resolution electron energy loss spectroscopy

被引：1
|
作者：
Ashima, H [1 ]
Sakamoto, K [1 ]
Takeda, H [1 ]
Uchida, W [1 ]
机构：
[1] Tohoku Univ, Grad Sch Sci, Dept Phys, Sendai, Miyagi 9808578, Japan
来源：
SURFACE SCIENCE | 2002年 / 514卷 / 1-3期
关键词：
phonons; alkali metals; silicon; electron energy loss spectroscopy (EELS); density functional calculations;
D O I：
10.1016/S0039-6028(02)01649-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have investigated the vibrational modes of the K/Si(111)-(3 x 1) surface using high-resolution electron energy loss spectroscopy (HREELS). An energy loss peak was clearly observed in the HREELS spectra at 55 meV. The origin of the energy loss peak is assigned to be a surface phonon mode which has negligible dispersion. Taking our calculation based on a density-functional method into account, we have determined the atomic vibrational motions that produce the 55-meV peak. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：332 / 336
页数：5
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