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A theoretical model of axial misfit stress relaxation in core-shell nanowires with
hexagonal cross section of the core through the nucleation of prismatic dislocation loops is
suggested. Different nucleation sites of the loops in core-shell nanowires are considered. The
energy change caused by the loop nucleation is calculated. The critical condition for the onset
of the loops is given and analyzed in detail. The most favorable sites in nanowires and the
optimal loop shape are defined.
Keywords: core-shell nanowires, misfit stress relaxation, prismatic dislocation loops |
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