1. Department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices
2. Renmin University of China
3. Beijing 100872
4. China
5. Department of Physics and Astronomy
6. the Department of Chemistry
7. and Stewart Blusson Quantum Matter Institute
8. Vancouver
9. Canada V6T 1Z1
10. Institute of Physics
11. Chinese Academy of Sciences
12. Beijing
13. 100190 China
14. Centre for the Physics of Materials and Department of Physics
15. McGill University
16. Montreal
17. Canada H3A 2T8