期刊
SURFACE SCIENCE
卷 602, 期 17, 页码 2876-2879出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2008.07.017
关键词
edge state; surface state; density functional calculations
资金
- CREST in Japan Science and Technology Agency
- Ministry of Education, Culture, Sports, Science and Technology of Japan
First-principle electronic structure calculation reveals the appearance of a new class of surface state on hydrogenated and clean Si(111) surfaces. The states are found to exhibit different characteristics to conventional surface electron states in terms of the peculiar distribution of the wavefunction depending on the wavenumber. In addition, the state results in flat dispersion bands in a part of the surface Brillouin zone having energy of about 8 eV below the top of the valence band. An analytic expression based on the tight-binding approximation corroborates the surface electron state results from the delicate balance of the electron transfer among the atoms situated near the surface. The obtained results give a possible extension and generalization of the edge state in graphite ribbons with zigzag edges. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据