Affiliation: | Department of Physics, School of Science, Tianjin University of Technology, Tianjin 300384, China,Department of Physics, School of Science, Tianjin University of Technology, Tianjin 300384, China,Department of Physics, School of Science, Tianjin University of Technology, Tianjin 300384, China,Department of Physics, School of Science, Tianjin University of Technology, Tianjin 300384, China,Department of Physics, School of Science, Tianjin University of Technology, Tianjin 300384, China and Department of Physics, School of Science, Tianjin University of Technology, Tianjin 300384, China |