1. School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, China
2. Key Laboratory of Intelligent Sensors and Advanced Sensing Materials of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, China
3. School of Physics and Materials, Nanchang University, Nanchang 330031, China
4. Department of Physics, Jinan University, Guangzhou 510632, China
5. College of Physics and Electronics Engineering, Hengyang Normal University, Hengyang 421008, China