Electronic Structure of Single Crystal and Amorphous Sb₂, Se₃

Abstract

Abstract The near normal incidence reflectivity of Sb 2 , Se 3 has been measured upon both crystalline and amorphous samples. The data were obtained for two polarizations (E ∥ a, E ∥ C) in the cleavage plane of the crystal. The data were Kramers‐Kronig analyzed and the implications of the results regarding the electronic structure of the compound were interpreted in terms of a valence bonding model. In particular the valence band electrons divide into those in weakly bonding resonance states and those in covalent bonding states. Upon the amorphous to crystalline transition it is the optical transitions originating in the resonance bonds which appear to be principally influenced.