1. State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China
2. Beijing Academy of Quantum Information Sciences, Beijing 100193, China
3. Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA
4. Southern University of Science and Technology, Shenzhen 518055, China
5. RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan