Affiliation: | WU YI-CHI WANG MING-HUA CHANG XIANG-RONG TIAN ZHONG-ZHUO XIAO JI-MEI (Department of Materials Physics, Beijing University of Science and Technology, Beijing 100083, PRC) AND HE YONG-SHU (Insititute of High Energy Physics, Academia Sinica, Beijing 100080, PRC) |