UNSPECIFIED (2000) The structure of the Cu(111)(root 7 x root 7)R19 degrees-S surface phase: a new normal-incidence X-ray standing wave study. Surface Science, 453 (1-3). pp. 183-190. ISSN 0039-6028

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Abstract

The local geometry of the adsorbed sulphur atoms in the Cu(111)(root 7 x root 7)R19 degrees-S surface phase has been investigated with normal-incidence X-ray standing wavefield (NIXSW) absorption using the (111), ((1) over bar 11) and (200) Bragg reflections. The results are compared with the predictions for previously proposed models based on earlier investigations using NIXSW [but only the (111) reflection], surface extended X-ray absorption fine structure, quantitative low energy electron diffraction, surface X-ray diffraction (SXRD) and scanning tunneling microscopy. The best agreement is found for the model deduced from SXRD based on Cu4S adclusters, but for the specific overlayer substrate registry in which these clusters are centred atop an outermost substrate layer Cu atom. All of the other models show significant inconsistencies with these new data. (C) 2000 Elsevier Science B.V. All rights reserved.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry Q Science > QC Physics
Journal or Publication Title:	Surface Science
Publisher:	ELSEVIER SCIENCE BV
ISSN:	0039-6028
Date:	10 May 2000
Volume:	453
Number:	1-3
Number of Pages:	8
Page Range:	pp. 183-190
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/13326

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