| Affiliation: | 1. School of Physics and Electron , Mianyang Normal University , Mianyang, China gongjt08@163.com;3. Department of Physics and Electronic Information Engineering , Neijiang Normal College , Neijiang, China;4. School of electrical information Engineering , Southwest Nationalities University , Chengdu, China;5. Department of Applied Physics , Chongqing University of Technology , Chongqing, China;6. International Centre for Materials Physics , Chinese Academy of Sciences , Shengyang, China |
