1. Department
of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, People’s Republic of China
2. National Laboratory of Solid State Microstructures and
Department of Physics, Nanjing University, Nanjing 210093, People’s Republic of China
3. Collaborative
Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China
4. School of Physical and Mathematical Science, Nanjing Tech University, Nanjing 211816, People’s Republic of China
5. Center for Integrated Spintronic
Devices (CISD), Hangzhou Dianzi University, Hangzhou, 310018, People’s Republic of China