1. Department of Physics and State Key Laboratory of Low-Dimensional Quantum Physics; Tsinghua University; Beijing 100084 China
2. Collaborative Innovation Center of Quantum Matter; Beijing 100084 China
3. College of Mechatronics and Automation; National University of Defense Technology; Changsha 410073 China
4. Beijing National Laboratory for Condensed Matter Physics; Chinese Academy of Sciences; Beijing 100190 China
5. School of Materials Science and Engineering and State Key Lab of New Ceramics and Fine Processing; Tsinghua University; Beijing 100084 China
6. Hefei National Laboratory for Physical Sciences at the Microscale and National Synchrotron Radiation Laboratory; University of Science and Technology of China; Hefei 230026 China
7. College of Science; National University of Defense Technology; Changsha 410073 China