1. Center of Materials Science and Optoelectronics Engineering College of Materials Science and Optoelectronic Technology University of Chinese Academy of Sciences Beijing 100049 P. R. China
2. Dynamics and Transport in Quantum Materials Helmholtz‐Zentrum Berlin für Materialen und Energie Albert‐Einstein‐Strasse 15 12489 Berlin Germany
3. Neutron Scattering Division Oak Ridge National Laboratory Oak Ridge TN 37830 USA
4. Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Science Shanghai 201204 P. R. China
5. CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of Sciences Beijing 100190 China