① Professor; College of Electronic and Informational Engineering; Hebei University; Baoding 071002; Key Laboratory of Semiconductor Material Science; Institute of Semiconductors; Chinese Academy of Science; Beijing 100083② Professor; Graduate School of Advanced Sciences of Matter; Hiroshima University; Japan③④ Professor; Department of Physics and State Key Laboratory of Solid State Microstructures; Nanjing University; Nanjing 210093
