The structure of the [formula omitted] surface phase: a new normal-incidence X-ray standing wave study

The local geometry of the adsorbed sulphur atoms in the Cu(111)( 7 × 7 )R19°-S surface phase has been investigated with normal-incidence X-ray standing wavefield (NIXSW) absorption using the (111), (1̄11) and (200) Bragg reflections. The results are compared with the predictions for previously propo...

Full description

Saved in:
Bibliographic Details
Published in:Surface science 2000-05, Vol.453 (1), p.183-190
Main Authors: Jackson, G.J., Driver, S.M., Woodruff, D.P., Cowie, B.C.C., Jones, R.G.
Format: Article
Language:English
Subjects:
Copper
Hydrogen sulphide
Low index single crystal surfaces
Surface relaxation and reconstruction
Surface structure, morphology, roughness, and topography
X-ray standing waves
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The local geometry of the adsorbed sulphur atoms in the Cu(111)( 7 × 7 )R19°-S surface phase has been investigated with normal-incidence X-ray standing wavefield (NIXSW) absorption using the (111), (1̄11) 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 Cu 4S 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.
ISSN:0039-6028
1879-2758
DOI:10.1016/S0039-6028(00)00346-0