1. Beijing National Laboratory for Molecular Sciences; Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
2. University of Chinese Academy of Sciences; Beijing 100049 China
3. Beijing National Laboratory for Condensed Matter Physics; Institute of Physics; Chinese Academy of Sciences; P.O. Box 603 Beijing 100190 China
4. Department of Chemistry; University of Kentucky; Lexington KY 40506 USA
5. Collaborative Innovation Center of Quantum Matter; Beijing 100190 China