1. Department of Mathematics and Physics, North China Electric Power University, Beijing 102206, China
2. Institute of Clusters and Low Dimensional Nanomaterials, North China Electric Power University, Beijing 102206, China
3. State Key Laboratory of Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
4. Collaboration Innovation Center of Quantum Matter, Beijing 100871, China
5. Frontiers Science Center for Nano-optoelectronics, Peking University, Beijing 100871, China