1. State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Chengdu 611731 China
2. School of Physics Southeast University Nanjing 211189 China
3. Department of Materials Science Sichuan University Chengdu 6110064 China
4. College of Materials Science and Engineering Fuzhou University Fuzhou 350108 China
5. State Key Laboratory for Mesoscopic Physics Frontiers Science Center for Nano‐optoelectronics School of Physics Academy for Advanced Interdisciplinary Studies Peking University Beijing 100871 China