Abstract
We report on theoretical and experimental studies of general critical conditions for the onset of relaxation in stressed quantum dots (QDs) embedded into a crystalline matrix. The fingerprint of the relaxation scenario is the formation of specific satellite dislocation loops. The scenario is applicable to both the QDs nucleated and ripened in the bulk and the QDs formed on the surface and then buried by the overgrowth. The results demonstrate that the critical relaxation radius for buried QDs is larger than the critical thickness for stressed lattice-mismatched films or surface islands.
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