1. RIKEN Center for Emergent Matter Science (CEMS), Wako351-0198, Japan
2. School of Physical Sciences and CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing100049, China
3. Department of Applied Physics, University of Tokyo, Tokyo113-8656, Japan
4. Research Center for Advanced Science and Technology, University of Tokyo, Tokyo153-8904, Japan
5. Department of Basic Science, The University of Tokyo, Meguro, Tokyo153-8902, Japan
6. CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing100049, China