Structural perfection of the Si(111)-(1×1) As surface
- 15 February 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 37 (5), 2766-2769
- https://doi.org/10.1103/physrevb.37.2766
Abstract
We have used medium-energy ion scattering to determine the structure of the arsenic-saturated Si(111) surface. Unlike the clean surface, which is reconstructed with a (7×7) symmetry, the arsenic chemisorbed surface exhibits a (1×1) symmetry at near monolayer coverages. Ion-scattering yields show a decrease in the number of displaced silicon atoms due to a partial removal of the reconstruction accompanied by some disorder. The arsenic-silicon spacing is relaxed outwards from the bulk silicon interplanar spacing by 0.2±0.1 Å.Keywords
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