Abstract
The electronic band structure of an ordered 1 × 1 overlayer of Sb on InP(110) has been investigated by angle resolved photoelectron spectroscopy using synchrotron radiation. Experimental energy dispersion of the features in the spectra has been mapped along high symmetry directions in the surface Brillouin zone. A number of criteria is employed to distinguish surface-related features and these are compared with a tight-binding, total energy minimisation calculation based on a zig-zag chain model of Sb on the InP(110) surface. Two bands near the valence band maximum are found to be in reasonable agreement with predicted states with bonding character associated with the adsorption on anion and cation sites. The origin of these and the remaining bands is discussed with reference to measurements which probe the symmetry of the states with respect to the mirror plane and the surface normal.
Published Version
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