Effect of initial crystallization temperature and surface diffusion on formation of GaAs multiple concentric nanoring structures by droplet epitaxy

Wang Yi^{1, 2}, Guo Xiang^{1, 2, 3}, Wei Jiemin², Yang Chen^{1, 3, 4}, Luo Zijiang^{1, 4}, Wang Jihong¹, Ding Zhao^{1, 2, 3, †}

Upper panel: AFM profiles along the [110] direction (insets show 450 nm × 450 nm AFM images of the fabricated nanostructures for samples in Figs. 1(a)–1(c). Lower panel: AFM profiles along the [1-10] direction.