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Stability of shuffle and glide dislocation segments with increasing misfit in epitaxial layers
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View: Figures


Image of FIG. 1.
FIG. 1.

snapshots of the shuffle core evolution at for different misfit conditions and different times . The extra plane is represented by the closed circles and the distance from the initial position (thin line) by the segment on the left. After the whole thermal cycle ( at ), the dislocation cores at 2%, 3%, and 4% misfits are found at the interface with the substrate.

Image of FIG. 2.
FIG. 2.

Shuffle dislocation core (top panel) and glide dislocation core (bottom panel) as obtained for the 2% misfit case. The additional plane and the Burgers vector are indicated.

Image of FIG. 3.
FIG. 3.

As in Fig. 1, for the glide set. At 1% misfit, the glide dislocation partializes, while for 2% and 3% (not shown) misfits, a perfect 60° glide core is observed. At high misfit (4%), a disordered structure is found. No migration is observed up to .

Image of FIG. 4.
FIG. 4.

Magnified snapshot at of a partial glide dislocation.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Stability of shuffle and glide dislocation segments with increasing misfit in Ge∕Si1−xGex(001) epitaxial layers