1. Department of Physics, Florida State University, Tallahassee, Florida 32306, United States
2. National High Magnetic Field Laboratory, Tallahassee, Florida 32310, United States
3. State Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, P. R. China
4. Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
5. IMDEA Nanoscience, Faraday 9, 28049 Madrid, Spain
6. Wuhan Institute of Quantum Technology, Wuhan 430206, China