Growth condition optimization and mobility enhancement through prolonging the GaN nuclei coalescence process of AlGaN/AlN/GaN structure*
He Xiao-Guanga), Zhao De-Gang†a), Jiang De-Shenga), Zhu Jian-Juna), Chen Pinga), Liu Zong-Shuna), Le Ling-Conga), Yang Jinga), Li Xiao-Jinga), Zhang Shu-Mingb), Yang Huib)
       
2DEG sheet density and mobility of samples in (a) series I, (b) series II, and (c) seires III. Samples A and B are marked in figures.