Structural Characterization of Amorphized InP: Evidence for Chemical Disorder

Abstract

Extended X-ray absorption fine structure measurements at the In K edge of stoichiometric InP amorphized by ion implantation reveal overcoordination of the In atom constituents and the presence of chemical disorder in the form of like-atom bonding. Excellent agreement is found between the measured bond-lengths and coordination numbers and recent theoretical calculations. The fraction of like-atom bonding is significant, suggesting that amorphous InP is best described by a Polk-like continuous random network with both even- and odd-membered rings.