Low-Energy-Electron Diffraction from Several Surfaces of Aluminum

Abstract

A model for aluminum used previously for low-energy-electron-diffraction (LEED) calculations by the layer Korringa-Kohn-Rostoker method on the {001} surfaces, is carefully defined and used to find LEED spectra for the {111} and {110} surfaces. Agreement between theory and experiment is as good for {111} as for {001}, but is not as good for {110}, which appears generally to be a "bad actor." Close comparison of the shapes of lines in the experimental and theoretical spectra suggests values for the interlayer spacing of the outermost layer of the crystal which are roughly 5% greater than bulk for the {111} face but 10% less than bulk for the {110} face.