1. Jiangsu
Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced
Microstructures, Nanjing National
Laboratory of Microstructuresand and Department of Physics, Nanjing University, Nanjing 210093, PR China
2. School
of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, PR China
3. Guizhou Provincial Key Laboratory of Computational Nano-material
Science, Guizhou Synergetic Innovation
Center of Scientific Big Data for Advanced Manufacturing Technology, Guizhou Education University, Guiyang 550018, PR China