The adsorption position of Hg on Ni(100): a transmission channeling study
The adsorption position of Hg on Ni(100) has been studied with transmission channeling. It is shown that for coverages up to 0.5 monolayer (ML), Hg adsorbs in the four-fold hollow site (FFHS) at a height of 2.25 ± 0.10 rA. This is at variance with an earlier report of adsorption in the bridge site....
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Published in | Surface science Vol. 310; no. 1; pp. L589 - L594 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
01.05.1994
Amsterdam Elsevier Science New York, NY |
Subjects | |
Online Access | Get full text |
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Summary: | The adsorption position of Hg on Ni(100) has been studied with transmission channeling. It is shown that for coverages up to 0.5 monolayer (ML), Hg adsorbs in the four-fold hollow site (FFHS) at a height of 2.25 ± 0.10
rA. This is at variance with an earlier report of adsorption in the bridge site. For a crystal temperature of 115 K and low coverage (
θ
Hg
t 0.18 ML), the two-dimensional vibration amplitude parallel to the surface,
ρ
Hg, is 0.10 +- 0.03
rA, but at higher coverage,
θ
Hg ∼ 0.45 ML, there is an apparent increase in the root-mean-square displacement of the Hg atoms from the FFHS. Possible origins of this increase are discussed. |
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ISSN: | 0039-6028 1879-2758 |
DOI: | 10.1016/0039-6028(94)91356-0 |