Surface alloy formation of noble adatoms adsorbed on Si(111)-root 3 x root 3-Pb surface: a first-principles study

	Surface alloy formation of noble adatoms adsorbed on Si(111)-root 3 x root 3-Pb surface: a first-principles study
	Li C; Wang F; Sun Q; Jia Y
	2011
Source Publication	JOURNAL OF PHYSICS-CONDENSED MATTER
Volume	23 Issue:26 Pages: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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