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, †}

AFM images (a)–(c) and RHEED patterns (d1)–(d3) of the samples with different initial crystallization temperatures at Step 2 (270 °C; 260 °C; 250 °C) respectively.