1. Max‐Planck Institute of Microstructure Physics Weinberg 2 Halle 06120 Germany
2. State Key Laboratory of Low‐Dimensional Quantum PhysicsDepartment of PhysicsTsinghua University Beijing 100084 China
3. Department of PhysicsUniversity of Arkansas Fayetteville AR 72701 USA
4. Collaborative Innovation Center of Quantum Matter Beijing 100084 China
5. RIKEN Center for Emergent Matter Science (CEMS) – Wako Saitama 351‐0198 Japan