论文类型：期刊论文
第一作者：J. Dong
通讯作者：N. L. Wang,Z. Fang
合写作者：J. L. Luo,X. Dai,G. F. Chen,G. Li,W. Z. Hu,D. Wu,Z. Li,G. Xu,H. J. Zhang
发表刊物：Europhysics Letters
收录刊物：SCI
学科门类：物理学
文献类型：J
卷号：83
期号：2
页面范围：27006
ISSN号：0295-5075
关键字：The interplay between different ordered phases, such as superconducting, charge or spin ordered phases, is of central interest in condensed-matter physics. The very recent discovery of superconductivity with a remarkable Tc=26 K in Fe-based oxypnictide La(O1−xFx)FeAs (see Kamihara Y. et al., J. Am. Chem. Soc., 130 (2008) 3296) is a surprise to the scientific community and has generated tremendous interest. The pure LaOFeAs itself is not superconducting but shows an anomaly near 150 K in both resistivity and dc magnetic susceptibility. Here we provide combined experimental and theoretical evidences showing that a spin-density-wave (SDW) state develops at low temperature, in association with electron Nematic order. The electron-doping by F suppresses the SDW instability and induces the superconductivity. Therefore, the La(O1−xFx)FeAs offers an exciting new system showing competing orders in layered compounds.
发表时间：2008-06-27
影响因子：2.203