Competing Orders and Spin-Density-Wave Instability in La(O$_{1-x}$F$_x$)FeAs

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dc.creatorDong, J.
dc.creatorZhang, H. J.
dc.creatorXu, G.
dc.creatorLi, Z.
dc.creatorLi, G.
dc.creatorHu, W. Z.
dc.creatorWu, D.
dc.creatorChen, G. F.
dc.creatorDai, X.
dc.creatorLuo, J. L.
dc.creatorFang, Z.
dc.creatorWang, N. L.
dc.date2008-03-24
dc.date.accessioned2026-07-07T09:47:04Z
dc.date.available2026-07-07T09:47:04Z
dc.descriptionThe 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 T$_c$= 26 K in Fe-based oxypnictide La(O$_{1-x}$F$_x$)FeAs is a surprise to the scientific community\cite{Kamihara08}. 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 the anomaly is caused by the spin-density-wave (SDW) instability, and electron-doping by F suppresses the SDW instability and recovers the superconductivity. Therefore, the La(O$_{1-x}$F$_x$)FeAs offers an exciting new system showing competing orders in layered compounds.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0803.3426
dc.identifierhttp://arxiv.org/abs/0803.3426
dc.identifierEurophysics Letters, 83, 27006 (2008).
dc.identifierdoi:10.1209/0295-5075/83/27006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163745
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleCompeting Orders and Spin-Density-Wave Instability in La(O$_{1-x}$F$_x$)FeAs
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