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Surface alloy formation of noble adatoms adsorbed on Si(111)-root 3 x root 3-Pb surface: a first-principles study | |
Li C![]() ![]() | |
2011 | |
Source Publication | JOURNAL OF PHYSICS-CONDENSED MATTER
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Volume | 23Issue:26Pages:Art. No. 265001 |
Abstract | The geometric structures, stability and electronic properties of initial stages of surface alloy formation for noble atoms adsorbed on Si(111)-root 3 x root 3-Pb surfaces have been comparatively and extensively studied by using first-principles calculations within density functional theory. Our results revealed that an Au trimer rather than a tetramer adsorption induces a surface alloy by combining with Pb atoms in covalent bonds, exhibiting semiconducting characteristics due to the localization of surface states. The stability of the two-dimensional (2D) surface alloy obeys the Hume-Rothery rule. The electronic structures of the 2D surface alloy are sensitive to the number of Au adatoms and can be modulated by the quantity of Au adatoms. Unlike the Au atoms, our further calculations indicated that adsorption of Ag or Cu atoms on the surface cannot form a surface alloy with Pb atoms in the surface layer due to a weaker interaction or smaller radius. |
metadata_24 | 国内 |
Keyword | Scanning-tunneling-microscopy Lead Monolayers |
Subject Area | 半导体物理 |
Indexed By | SCI |
Language | 英语 |
Date Available | 2011-07-07 |
Document Type | 期刊论文 |
Identifier | http://ir.semi.ac.cn/handle/172111/21403 |
Collection | 半导体超晶格国家重点实验室 |
Recommended Citation GB/T 7714 | Li C,Wang F,Sun Q,et al. Surface alloy formation of noble adatoms adsorbed on Si(111)-root 3 x root 3-Pb surface: a first-principles study[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2011,23(26):Art. No. 265001. |
APA | Li C,Wang F,Sun Q,&Jia Y.(2011).Surface alloy formation of noble adatoms adsorbed on Si(111)-root 3 x root 3-Pb surface: a first-principles study.JOURNAL OF PHYSICS-CONDENSED MATTER,23(26),Art. No. 265001. |
MLA | Li C,et al."Surface alloy formation of noble adatoms adsorbed on Si(111)-root 3 x root 3-Pb surface: a first-principles study".JOURNAL OF PHYSICS-CONDENSED MATTER 23.26(2011):Art. No. 265001. |
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