摘要
<正>With the support by the National Natural Science Foundation of China and the Ministry of Science and Technology of China,the research team led by Associate Prof.Zhang Ding(张定)and Prof.Xue QiKun(薛其坤)at the Department of Physics,Tsinghua University,in collaboration with Prof.Liu HaiWen of Beijing Normal University,Prof.Jurgen Smet of Max Planck Institute for Solid State Research in