1. Department of Physics, State Key Laboratory for Silicon
Materials, and Center for Correlated Matter, Zhejiang University, Hangzhou, Zhejiang, 310027, People’s Republic of China
2. Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
3. Department
of Electrical Engineering, Optoelectronics Center, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
4. NHMFL, Los Alamos National
Lab, Los Alamos, New Mexico 87545, United States