1. School of Urban Construction, Hebei Normal University of Science & Technology, Qinhuangdao 066004, China
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
4. Songshan Lake Materials Laboratory, Dongguan 523808, Guangdong, China