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	Podcast:		Geowissenschaften - Open Access LMU
	Episode:		Static lattice distortions and the structure of Au/Si(111)-(5×1): An x-ray-diffraction study
	Category:		Science & Medicine
	Duration:		00:00:00
	Publish Date:		1991-01-01 05:00:00
	Description:		Grazing-incidence x-ray diffraction has been used to determine the atomic arrangement in the 5×1 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 Å from their bulk position. The structure has a disordered 5×2 periodicity due to the variation of the interatomic Au-Au distances within a row in the [011¯] direction. The model is consistent with recent scanning-tunneling-microscopy topographs.
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