1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
4. Beijing Lattice Semiconductor Co., Ltd., China
5. Department of Chemistry, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China