1. School of Mathematics and Physics, University of South China, Hengyang 421001, China
2. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
3. Department of Applied Physics, School of Physics and Electronics, Hunan University, Changsha 410082, China
4. Synergetic Innovation Center for Quantum Effects and Applications of Hunan, Changsha 410081, China