1. Department of Physics, State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), and Institute for Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai 200433, China.
2. Department of Physics and Center of Theoretical and Computational Physics, University of Hong Kong, Hong Kong, China.
3. Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China.