1. State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China
2. Frontier Science Center for Quantum Information, Tsinghua University, Beijing 100084, China
3. Collaborative Innovation Center of Quantum Matter, Beijing 100084, China
4. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
5. Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China