1. Shanghai Key Laboratory of Special Artificial Microstructure Materials, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China
2. Key Laboratory of Polar Materials and Devices (MOE) and State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, People's Republic of China
3. School of Microelectronics, Xi'an Jiaotong University, Xi'an 710049, China
4. Key Laboratory for Magnetism and Magnetic Materials (MOE), Lanzhou University, Lanzhou 730000, People's Republic of China