Surface phonon dispersion curves of the LaB6(111) surface

被引：6
|
作者：
Rokuta, E
Yamamoto, N
Hasegawa, Y
Nagao, T
Trenary, M
Oshima, C
Otani, S
机构：
[1] WASEDA UNIV, KAGAMI MEM LAB MAT SCI & TECHNOL, SHINJUKU KU, TOKYO 169, JAPAN
[2] NATL INST RES INORGAN MAT, TSUKUBA, IBARAKI 305, JAPAN
来源：
SURFACE SCIENCE | 1996年 / 357卷 / 1-3期
关键词：
electron energy loss spectroscopy; LaB6(111); phonons;
D O I：
10.1016/0039-6028(96)00251-8
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：
Energy dispersion curves of the surface phonons of the LaB6 (111) surface have been measured by using high resolution electron energy loss spectroscopy, We found two large loss peaks and three small loss peaks in the specular spectra and several branches in the off-specular spectra. On the basis of lattice dynamical calculations using bulk parameters, we have obtained the theoretical phonon dispersion curves of the unrelaxed surface. One vibrational mode appeared above the bulk phonon bands, which indicates stiffening of the B-B bonds of the surface octahedra.
引用
收藏
页码：712 / 716
页数：5
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