Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Science, Beijing 100190, China;
