1. School of Electronic and Information Engineering Beihang University Beijing 100191 P. R. China
2. Zhangjiang Laboratory 100 Haike Road Shanghai 201204 P. R. China
3. Fert Beijing Institute MIIT Key Laboratory of Spintronics School of Integrated Circuit Science and Engineering Beihang University Beijing 100191 P. R. China
4. International Quantum Academy Shenzhen 518055 P. R. China
5. Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China
6. Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China
7. Songshan Lake Materials Laboratory Dongguan 523808 P. R. China
8. School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 P. R. China