1. International Center for Quantum Design of Functional Materials (ICQD), and CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
2. Department of Materials Science & Engineering, CAS Key Lab of Materials for Energy Conversion, Anhui Laboratory of Advanced Photon Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
3. Department of Physics, The University of Texas at Austin, Austin, Texas 78712, United States
4. Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China