1. Key Laboratory of Microelectronics & Integrated Technology
2. Institute of Microelectronics
3. Chinese Academy of Sciences
4. Beijing 100029
5. China
6. Beijing National Laboratory for Condensed Matter Physics
7. Institute of Physics
8. Beijing 100190
9. Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-nano Devices
10. Department of Physics
11. Renmin University of China
12. Beijing 100872