Static lattice distortions and the structure of Au/Si(111)-(5×1): An x-ray-diffraction study
1991; American Physical Society; Volume: 43; Issue: 14 Linguagem: Inglês
10.1103/physrevb.43.12130
ISSN1095-3795
AutoresC. Schamper, W. Moritz, H. Schulz, R. Feidenhans’l, Morten Nielsen, F. Grey, Robert L. Johnson,
Tópico(s)Magnetic properties of thin films
ResumoGrazing-incidence x-ray diffraction has been used to determine the atomic arrangement in the 5\ifmmode\times\else\texttimes\fi{}1 structure of Au on Si(111). The main features of this structure are partially occupied rows of gold atoms in low-symmetry sites. The density of Au atoms is highly asymmetric in the direction perpendicular to the rows. The substrate atoms in the top double layer are shifted up to 1 \AA{} from their bulk position. The structure has a disordered 5\ifmmode\times\else\texttimes\fi{}2 periodicity due to the variation of the interatomic Au-Au distances within a row in the [011\ifmmode\bar\else\textasciimacron\fi{}] direction. The model is consistent with recent scanning-tunneling-microscopy topographs.
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