1. Department of Physics CAS Key Laboratory of Strongly‐coupled Quantum Matter Physics University of Science and Technology of China Hefei Anhui 230026 China
2. Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing Tech University (NanjingTech) Nanjing Jiangsu 211816 China
3. Instruments Center for Physical Science University of Science and Technology of China Hefei Anhui 230026 China