Fig. 3

Atomic force micrographs of InN on N-polar GaN. Nominal InN thicknesses of (a)/(d) 1 nm, (b)/(e) 2 nm, (c)/(f) 3 nm, (g) 5 nm, (h) 10 nm, and (i) 20 nm. a–c Show 3D images whereas (d)–(i) depict top down images with the scale at the right as follows: −5 to 5 nm for (d)–(f) and −10 to 10 nm for (g)–(i). Reprinted from Reilly et al., Appl. Phys. Lett. 114, 241103 (2019) with permission of AIP Publishing⁷⁸. Adapted from Lund et al., J. Appl. Phys. 123, 055702 (2018) with permission of AIP Publishing⁴⁸