1. Department of Chemistry, Duke University, Durham, NC 27708, USA
2. Synergetic Innovation Center of Quantum Information and Quantum Physics, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
3. CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei 230026, China
4. Department of Physics, Duke University, Durham, NC 27708, USA
5. Key Laboratory of Theoretical Chemistry of Environment, School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China