1. School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
2. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China
3. Department of Applied Physics, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan
4. School of Physics, The University of New South Wales, Sydney 2052, Australia
5. South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
6. State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
7. Department of Electrical and Computer Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
8. Laboratoire de Physique Théorique et Modélisation, Université de Cergy-Pontoise, 95302 Cergy-Pontoise Cedex, France