1. Department
of Chemical Physics and Hefei National Laboratory for Physical Sciences
at the Microscale and Synergetic Innovation Center of Quantum Information
and Quantum Physics, University of Science and Technology of China, Hefei,
Anhui 230026, China
2. Guizhou
Provincial Key Laboratory of Computational Nano-Material Science,
Institute of Applied Physics, Guizhou Normal College, Guiyang, Guizhou 550018, China