Physical origin of planar linear dichroism in van der Waals semiconductors using main group elements. - Qiang Gao; Yali Yu; Kaiyao Xin; Ziqi Zhou; Hui-Xiong Deng; Lin Li; Xiaojie Tang; Congxin Xia; Duan-Yang Liu; Jian-Bai Xia; Jun Kang; Zhongming Wei (Sci. China Inf. Sci., 2024)