1. Department of Physics, Harbin Institute of Technology, Harbin 150001, China
2. Department of Physics and the Center of Theoretical and Computational Physics, The University of Hong Kong, Hong Kong, China
3. Department of Physics and Astronomy, University of Wyoming, Laramie, Wyoming 82071, USA
4. Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150001, China
5. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China