Affiliation: | YAN Jun-Jue YU Hong-Bin LI Zhi-GangGE Zheng, YANG Wei-Sheng(Department of Physics, Peking University, Beijing 100871, PRC)FANG Hong-Sheng, WANG Jia-JunYANG Zhi-Gang and Deng Xu-Rui(Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, PRC) |