[Kuang, Lulin;Feng, Shiping] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China.^[Lan, Yu] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421002, Peoples R China.^[Zhao, Huaisong] Qingdao Univ, Coll Phys, Qingdao 266071, Peoples R China.