Competing orders and spin-density-wave instability in La(O 1−x F x )FeAs
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- 27 June 2008
- journal article
- Published by IOP Publishing in Europhysics Letters
- Vol. 83 (2) , 27006
- https://doi.org/10.1209/0295-5075/83/27006
Abstract
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.Keywords
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This publication has 6 references indexed in Scilit:
- Doping-dependent phase diagram of LaOMAs (M=V–Cu) and electron-type superconductivity near ferromagnetic instabilityEurophysics Letters, 2008
- Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 KJournal of the American Chemical Society, 2008
- Electron Nematic Phase in a Transition Metal OxideScience, 2007
- Electronic structure and properties of the Fermi surface of the superconductor LaOFePPhysical Review B, 2007
- Charge-Density-Wave Mechanism in: Photoemission ResultsPhysical Review Letters, 1999
- Spin-density-wave antiferromagnetism in chromiumReviews of Modern Physics, 1988