Abstract

We have studied the ordered surface structures that develop sulfur adsorption on the stepped Mo(910) and kinked Mo(28,4,1) surfaces. The influence of adsorbed sulfur on the terrace width and step height has also been investigated. While the clean Mo(910) and Mo(28,4,1) surfaces have predominantly monatomic height steps, sulfur adsorption leads to a restructuring of the surface through the formation of two atom height steps. On both surfaces, c(2 × 2) and thenp(2 × 1) structure. from with increasing sulfur coverage. The steps are domainsselective for the p(2 × 1) structure. Only those domains with the longer side of the unit cell perpendicular to the step edges are well ordered. This suggests a particularly strong absorbate-step interaction.

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