Figure 5a

SEM photographs of undoped GaN films grown at 950°.

Figure 5b

SEM photographs of undoped GaN films grown at 980°.

Figure 5c

SEM photographs of undoped GaN films grown at 1000°.

Figure 5d

SEM photographs of undoped GaN films grown at 1020°.

Figure 5e

SEM photographs of undoped GaN films grown at 1050°.

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