1. Department of Physics, School of Science, Harbin University of Science and Technology, Harbin, China
2. School of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin, China
3. School of Light Industry, Harbin University of Commerce, Harbin, China
4. Condensed Matter Science and Technology Institute, The school of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, China