The In-Plane-Two-Folders Symmetric a-Plane AlN Epitaxy on r-Plane Sapphire Substrate. - Fabi Zhang; Lijie Huang; Jin Zhang; Zhiwen Liang; Chenhui Zhang; Shangfeng Liu; Wei Luo; Junjie Kang; Jiakang Cao; Tai Li; Qi Wang 050; Ye Yuan (Symmetry, 2022)