1. Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control Ministry of Education, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China
2. Department of Physics and TcSUH, University of Houston, Houston, Texas 77204, United States
3. Key Laboratory for Matter Microstructure and Function of Hunan Province, Hunan Normal University, Changsha 410081, China
4. Ningbo Fengcheng Advanced Energy Materials Research Institute, Ningbo, Zhejiang 315500, China