1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
2. SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912 Beijing, 100083, China
3. College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
4. High Field Magnet Laboratory, HFML-EMFL, Radboud University, 6525 ED Nijmegen, The Netherlands
5. MajuLab, International Joint Research Unit UMI 3654, CNRS, Université Côte d’Azur, Sorbonne Université, National University of Singapore, Nanyang Technological University, Singapore 637371
6. Beijing Academy of Quantum Information Sciences, Beijing 100193, China
7. State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China