Abstract

A theoretical study on formation energy of zinc-blende (ZB) and wurtzite (WZ) ZnO1-x S x has been carried out with the first-principles methods and the Alloy Theoretic Automated Toolkit (ATAT). The cluster expansion approach was used to describe the disordered alloys, for x = 1/6, 1/3, 1/2, 2/3, and 5/6. With the analysis of the formation energy, the WZ structure is thermodynamically more stable than ZB structure at all temperatures and alloy compositions, which is in agreement with experiments.

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