1. Key Laboratory for Computational Physical Sciences (MOE), State Key Laboratory of Surface Physics, Institute of Computational Physical Sciences and Department of Physics, Fudan University, Shanghai 200433, China
2. Shanghai Qizhi Institution, Shanghai 200232, China
3. Department of Chemistry, University of Southern California, Los Angeles, California 90089, United States
4. Department of Physics & Astronomy, University of Southern California, Los Angeles, California 90089, United States