Affiliation: | Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China;Department of Physics and Electronic Information Science, Hengyang Normal University, Hengyang 421008, China |