1. Institute of Advanced Materials, Beijing Normal University, Beijing 100875, China
2. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. School of Physical Science, University of Chinese Academy of Sciences, Beijing 100190, China
4. The Key Laboratory of Microelectronics Device & Integrated Technology, Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
5. Institute of Microelectronics, Beijing Innovation Center for Future Chips (ICFC), Tsinghua University, Beijing 100084, China
6. Beijing National Research Center for Information Science and Technology (BNRist), Tsinghua University, Beijing 100084, China
7. Songshan-Lake Materials Laboratory, Dongguan 523808, Guangdong Province, China
8. Beijing Key Laboratory for Nanomaterials and Nanodevices, Beijing 100190, China