Figure 4.

The 2-DEG between AlN/GaN interface with different AlN thickness. (a) The thickness of AlN barrier less than the critical thickness (d0), (b) the thickness of AlN barrier beyond d0, and (c) the thickness of AlN barrier beyond d0, and the GaN was deposited on the AlN barrier.

Xu et al. Nanoscale Research Letters 2012 7:141   doi:10.1186/1556-276X-7-141
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