Affiliation: | Center for the Condensed-Matter Science and Technology,
Harbin Institute of Technology, Harbin 150001, China; Department of Physics, College of Science,
Yanbian University, Yanji
133002, China; Department of Physics, College of Science,
Yanbian University, Yanji
133002, China;Center for the Condensed-Matter Science and Technology,
Harbin Institute of Technology, Harbin 150001, China |