Affiliation: | 1. Department of Applied Physics , Chongqing University of Technology , Chongqing, 400054, People's Republic of China;2. International Center for Materials Physics , Chinese Academy of Sciences , Shenyang, 110016, People's Republic of China wenlinfeng@126.com;4. Department of Optics and Electronics , Chengdu University of Information Technology , Chengdu, 610225, People's Republic of China;5. Department of Material Science , Sichuan University , Chengdu, 610064, People's Republic of China;6. International Center for Materials Physics , Chinese Academy of Sciences , Shenyang, 110016, People's Republic of China |