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We study the dislocation formation in 2D nanoscopic islands with two methods,the Molecular Static method and the Phase Field Crystal method. It is foundthat both methods indicate the same qualitative stages of the nucleationprocess. The dislocations nucleate at the film-substrate contact point and theenergy decreases monotonously when the dislocations are farther away from theisland-wetting film contact points than the distance of the highest energybarrier.

Two Approaches to Dislocation Nucleation in the Supported Heteroepitaxial Equilibrium Islanding Phenomenon