1. Key Laboratory for Renewable Energy; Beijing Key Laboratory for New Energy Materials and Devices; Beijing National Laboratory for Condensed Matter Physics; Institute of Physics; Chinese Academy of Sciences; Beijing 100190 China
2. Brookhaven National Laboratory; Upton NY 11973 USA
3. Laboratory of Advanced Materials & Electron Microscopy; Beijing National Laboratory for Condensed Matter Physics; Institute of Physics; Chinese Academy of Sciences; Beijing 100190 China
4. Collaborative Innovation Center of Quantum Matter; Beijing 100190 China