1. Department of Physics, and CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
2. Institute for Structure and Function, Department of Physics, and Center for Quantum Materials and Devices, Chongqing University, Chongqing 400044, China
3. CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei, Anhui 230026, China and Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China