Structure of c(2 × 2) overlayers of sulfur on Ni(100)

Abstract

We conclude, via a multiple-scattering analysis of elastic low-energy electron diffraction intensities measured at T = 30°K, that the diffusion of sulphur to a (100) surface of nickel leads to a c (2 × 2) saturated monolayer in which sulphur atoms occupy the four-fold coordinated sites at a distance d = 1.70 ± 0.1A above a plane passing through the centers of the Ni atoms in the underlying plane.