School of Physics and Electric Engineering, Anyang Normal University, Anyang 455000, China;
School of Physics and Electric Engineering, Anyang Normal University, Anyang 455000, China;
School of Physics and Electric Engineering, Anyang Normal University, Anyang 455000, China;
School of Physics and Electric Engineering, Anyang Normal University, Anyang 455000, China;
Department of Physics, Taiyuan University of Technology, Taiyuan 030024, China;
School of Physics, State Key Laboratory for Crystal Materials, Shandong University, Jinan 250100,China;
