1. Beijing National Laboratory for Condensed Matter Physics Renewable Energy Laboratory Institute of Physics Chinese Academy of Sciences (CAS) Beijing 100190 China
2. School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China
3. State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China
4. Huairou Division Institute of Physics Chinese Academy of Sciences Beijing 101400 China
5. Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China
6. Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China