Structure of the Ge(111)-c(2 ? 8) surface as determined from scattered X-ray intensities along crystal truncation rods

van Silfhout, Roelof G., van der Veen, J. F., Norris, C. and MacDonald, John Emyr ORCID: https://orcid.org/0000-0001-5504-1692 1990. Structure of the Ge(111)-c(2 ? 8) surface as determined from scattered X-ray intensities along crystal truncation rods. Faraday Discussions of the Chemical Society 89 , pp. 169-180. 10.1039/dc9908900169

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Abstract

In an X-ray diffraction study of the c(2 × 8) reconstructed Ge(111) surface we have measured intensity profiles along integer-order rods of Bragg scattering perpendicular to the surface plane. The diffracted intensity profiles are explained in terms of a simple adatom model for the reconstruction. The adatoms are found to occupy T4 sites on a distorted bulk-like substrate. We rule out any model for c(2 × 8) reconstruction that is based on stacking faults in the substrate. For the adatom model we give best-fit values for the positions of the atoms at the surface and compare them with those obtained from total-energy and keating-energy minimisation calculations.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Royal Society of Chemistry
ISSN:	0301-7249
Last Modified:	24 Oct 2022 10:51
URI:	https://orca.cardiff.ac.uk/id/eprint/46142

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