School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;
Department of Physics, Yantai University, Yantai 264005, China;
Department of Physics, Yantai University, Yantai 264005, China;
School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;
School of Mechanical & Automotive Engineering, Liaocheng University, Liaocheng 252059, China;
School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;
School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;
