NaNa interactions on Al(001)
The thin-film LAPW method has been applied to the problem of interactions between chemisorbed alkali atoms on a simple metal substrate. Self-consistent results are reported for c(2 × 2) and p(1 × 1)Na overlayers on Al(001). Although the long-range interactions between sodium atoms are dipole-dipole,...
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| Published in | Surface science Vol. 194; no. 3; pp. 567 - 578 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
01.02.1988
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| Online Access | Get full text |
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| Summary: | The thin-film LAPW method has been applied to the problem of interactions between chemisorbed alkali atoms on a simple metal substrate. Self-consistent results are reported for c(2 × 2) and p(1 × 1)Na overlayers on Al(001). Although the long-range interactions between sodium atoms are dipole-dipole, the spatial distribution of the individual dipoles affects the sequence of overlayer structures formed. A model is offered in which the dipoles extend out to about 3.8 a.u. and begin to overlap for coverages greater than one-half monolayer. This model accounts for the diminished Na sticking coefficient for dosages exceeding 0.5 monolayer and offers an explanation for the failure of the p(1 × 1) overlayer to form. |
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| Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
| ISSN: | 0039-6028 1879-2758 |
| DOI: | 10.1016/0039-6028(88)90871-0 |