Structure analysis of the Si(111)√3 × √3R30°-Ag surface
- 27 May 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 66 (21), 2762-2765
- https://doi.org/10.1103/physrevlett.66.2762
Abstract
The structure of the Si(111)√3 × √3 R30°-Ag surface has been analyzed with a novel form of low-energy ion-scattering spectroscopy and energy-minimization calculations. The topmost layer of the surface is formed by Ag atoms with a honeycomb-chained-trimer arrangement in which the intratrimer Ag-Ag distance is 5.1±0.2 Å. At 0.75±0.07 Å below the Ag layer there exists a Si layer with three Si atoms per surface unit cell. The lower layer of the subsequent bulklike Si double layers is split into a honeycomb and a √3 × √3 layer with a large interlayer distance of about 0.6 Å.Keywords
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