Alkali-metal adsorption on dissimilar alkali-metal monolayers preadsorbed on Cu(001): Li on Na and Na on Li

Seigi Mizuno, Hiroshi Tochihara, Takaaki Kawamura

研究成果: Contribution to journalArticle

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An adsorption system of metal-on-metal growth is presented. The adsorption of alkali-metal atoms on monolayers of dissimilar alkali metals preadsorbed on the Cu(001) surface has been studied by Auger-electron spectroscopy, work-function change, and low-energy electron-diffraction intensity analysis. We have examined the following three adsorption systems on Cu(001) at 180 K; Na on a full monolayer of Li, Li on a full monolayer of Na, and Na on a submonolayer of Li, namely, the c(2×2) structure of Li adatoms. It is found that a simple overlayer formation of Na takes place on the full Li monolayer, while Li atoms substitute Na adatoms for Li adsorption on the full Na monolayer. For adsorption of Na on the Li-c(2×2) structure whose coverage is 5/8 of the full Li monolayer, it is found that Na atoms compress the Li adlayer to become denser monolayers. The Na atoms do not intermix with Li adatoms, but they form islands of the c(2×2) structure on Cu(001).

元の言語英語
ページ(範囲)17540-17546
ページ数7
ジャーナルPhysical Review B
50
発行部数23
DOI
出版物ステータス出版済み - 1 1 1994
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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