Surface electronic structure of α-Mo2C(0001)

被引：11
|
作者：
Kato, M
Sato, T
Ozawa, K
Edamoto, K
Otani, S
机构：
[1] Rikkyo Univ, Dept Chem, Toshima Ku, Tokyo 1718501, Japan
[2] Tokyo Inst Technol, Dept Chem & Mat Sci, Tokyo 1520033, Japan
[3] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
来源：
SURFACE SCIENCE | 2006年 / 600卷 / 02期
关键词：
angle-resolved photoemission; surface electronic phenomena (work function; surface potential; surface states; etc.); carbides; low index single crystal surfaces;
D O I：
10.1016/j.susc.2005.10.043
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：
The electronic structure of alpha-Mo2C(0001) has been investigated by angle-resolved photoemission spectroscopy utilizing synchrotron radiation. A sharp peak is observed at 3.3 eV in normal-emission spectra. Since the peak shows no dispersion as a function of photon energy and is sensitively attenuated by oxygen adsorption, the initial state of the peak is attributed to a surface state. Resonant photoemission study shows that the state includes substantial contribution of 4d orbitals of the Mo atoms in the second layer. The emissions with constant kinetic energies of 22 and 31 eV above the Fermi level (E-F) are found in normal-emission spectra, and these emissions are interpreted as originating from the Mo N1N23V and N23VV Auger transitions, respectively. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：448 / 452
页数：5
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