%A %T %0 Journal Article %D 2014 %J 中国物理快报 %R 10.1088/0256-307X/31/5/057302 %P 57302-057302 %V 31 %N 05 %U {https://cpl.iphy.ac.cn/CN/abstract/article_59544.shtml} %8 2014-04-24 %X