Using the molecular dynamics simulation based on Stillinger–Weber potentials, the roles of lattice mismatch and threading dislocations (c-screw type) on phase segregation in InGaN alloys were explored. The thermodynamic stability and structural deformation of the InGaN alloys with In-rich clusters were analyzed when biaxial stress and c-screw dislocations acted on the systems. The results showed that the formation of In-rich clusters was suppressed in the case of lattice mismatch, whereas it takes place in the presence of c-screw dislocations . independent of the strain condition of InGaN alloys.

Influences of the Biaxial Strain and c-Screw Dislocation on the Clustering in InGaN Alloys. H.Lei, J.Chen, P.Ruterana: Journal of Applied Physics, 2010, 108[10], 103503