1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
2. Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
3. Department of Physics, Nanjing Normal University, Nanjing, China
4. HKUST Shenzhen Research Institute, Shenzhen 518057, China