Figure 5

Schematic cross section of the GaN stripes for longer growth time. Dashed lines are different intermediate stages of the development of these stripes. During the growth, the two edges of the top C facet are moving along linear trajectories (provided constant growth rates) indicated by arrows. For undoped GaN, the top C facet vanishes above the crossing of the two trajectories. Note that if depends only on the structural properties of GaN, is determined by the anisotropy of the growth i.e. the ratio of vertical to lateral growth rates.

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