The effect of screening on the lattice images of ZnSe and GaAs

Abstract

The crystal potentials of ZnSe and GaAs have been constructed by considering the reconstruction of valence charge electrons due to the crystallization. These potentials differ significantly from those obtained by the traditional method, consisting of the superposition of neutral atoms, in the low-order crystal potential components such as 111, 200, 220 and 311, especially in ZnSe. As a result, the distinctions in the image between the constituent atoms are more apparent in our results than in the traditional results. It is concluded that the lattice image calculation of these compounds needs to use the crystal potential which takes account of the accurate valence state and even thin crystals.