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Titolo:
Determination of a (2 root 2 x root 2)R45 degrees structure formed by coadsorption of Li and Mg on a Cu(001) surface
Autore:
Chen, MS; Mizuno, S; Tochihara, H;
Indirizzi:
Kyushu Univ, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan Kyushu Univ Kasuga Fukuoka Japan 8168580 , Kasuga, Fukuoka 8168580, Japan
Titolo Testata:
SURFACE SCIENCE
fascicolo: 1-3, volume: 493, anno: 2001,
pagine: 91 - 98
SICI:
0039-6028(20011101)493:1-3<91:DOA(R2>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENERGY-ELECTRON DIFFRACTION; ADSORPTION; LEED; ALLOY;
Keywords:
copper; alkali metals; alkaline earth metals; low energy electron diffraction (LEED); low index single crystal surfaces; surface structure, morphology, roughness, and topography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Tochihara, H Kyushu Univ, Dept Mol & Mat Sci, Kasuga, Fukuoka 8168580, Japan Kyushu Univ Kasuga Fukuoka Japan 8168580 uoka 8168580, Japan
Citazione:
M.S. Chen et al., "Determination of a (2 root 2 x root 2)R45 degrees structure formed by coadsorption of Li and Mg on a Cu(001) surface", SURF SCI, 493(1-3), 2001, pp. 91-98

Abstract

The coadsorption of Li and Mg on Cu(001) at room temperature was studied by low-energy electron diffraction (LEED). A (2 root2 x root2)R45 degrees structure was observed and determined by a tensor LEED analysis. It is an ordered mixed phase, in which Mg atoms are located on fourfold substitutional sites, while Li atoms occupy surface hollow sites, instead of the separation into c(2 x 2)-Mg and (2 x 1)-Li phases formed in the individual adsorption. The (2 root2 x root2)R45 degrees structure is comprised of alternative atomic-rows of substitutional Mg atoms and hollow-site Li atoms aligned along the [010] direction. The stability of this structure is discussed in terms of adsorption energy of Li and Mg atoms and the displacement of surface Cu atoms. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 04/12/20 alle ore 12:29:11