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A statistical model is presented to characterize the influence of stress field inhomogeneity on the probability of interactions between threading dislocations in thin films. Any degree of stress field inhomogeneity is shown to increase the likelihood of interactions. However, below a critical level, the effect of stress inhomogeneity is small, while above this level a dramatic effect is observed....
The dislocation interactions that stop threading dislocations (threads) during relaxation at increasing applied strains in single-crystal thin films are investigated using large-scale three-dimensional dislocation dynamics simulations. Threads were observed to stop via interactions with both threads and misfit dislocations (misfits). Both types of interactions were shown to depend on stress inhomogeneity...
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