1. Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China
2. Harbin Institute of Technology, Harbin 150080, China
3. College of Physics and Electronic Engineering, and Center for Computational Sciences, Sichuan Normal University, Chengdu 610068, China
4. MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7511NE Enschede, The Netherlands
5. School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou 318000, China