1. Department of Physics Southern University of Science and Technology Shenzhen 518055 China
2. Department of Physics Harbin Institute of Technology Harbin 150001 China
3. Department of Physics and Astronomy University of Kansas Lawrence KS 66045 USA
4. Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen 518055 China
5. SUSTech Academy for Advanced Interdisciplinary Studies Southern University of Science and Technology Shenzhen 518055 China