1. Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science; Center for Green Innovation; School of Mathematics and Physics; University of Science and Technology Beijing; Beijing 100083 P. R. China
2. Beijing National Laboratory for Condensed Matter Physics; Institute of Physics; Chinese Academy of Science; Beijing 100190 P. R. China
3. Department of Physics; Liaoning University; Shenyang 110036 P. R. China