1. National Laboratory of Solid
State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
2. School of Electronics and Information
and College of Chemistry and Biological Science, Yi Li Normal University, Yining 835000, China
3. Kazakh National Technical University named after K. I. Satpaev, Almaty,
050013, Kazakhstan
4. Laboratory of Soft Condensed
Matter Physics and Interdisciplinary Research, Soochow University, Suzhou 215006, China