Si(111)-(√3≤ √3≤)Ag surface structure studied by impact-collision ion-scattering spectrometry
- 25 April 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 60 (17), 1739-1742
- https://doi.org/10.1103/physrevlett.60.1739
Abstract
Using the technique of impact-collision ion-scattering spectrometry, we showed that the geometry of the Si(111)-(√3 × √3 )Ag surface consists of Si honeycomb on top of Ag trimers. The separation of the Si and Ag layers is 0.7±0.3 Å and the Si-Ag bond length is 2.73±0.3 Å. We also observed, for the first time, type-A and type-B arrangements of the Si and Ag atoms on the surface, with type B being type A rotated 180° about the surface normal.Keywords
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