1. Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic System, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
2. Key Lab of Featured Metal Resources Utilization and Advanced Materials Development, Nano and Energy Research Center, School of Physics, Guangxi University, Nanning 530004, China
3. International Center for Quantum Materials and Electron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China