Competing orders and spin-density-wave instability in La(O1−xFx)FeAs
By Jing Dong, Hao Zhang, Guizhou Xu, Zhenghong Li, Gang Li, Wanzheng Hu, Dan Wu, Gang Chen, X. Dai, Janlin Luo and 2 more. 2008
484 citations recorded by the source corpus.
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.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/b2965422c4c8a50496450572318a4562ca1c1e5e
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In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Iron-based high transition temperature superconductors (2014, background): “In the beginning, the nesting between the electron and hole Fermi surface sheets was considered to be the driving force of the CAF state, as it coincides with the (π , 0) ordering wave vector [67].”
- Superconductivity in iron compounds (2011, background): “Together with nesting on the Fermi surface, these Fe bands can lead to magnetic ordering (Cao, Hirschfeld, and Cheng, 2008; J. Dong et al., 2008; Cvetkovic and Tesanovic, 2009; Singh, 2009) as discussed in Sec.”
- Electrodynamics of correlated electron materials (2011, background): “48(c)]; and more recently in iron-pnictides (Dong et al., 2008; Hu et al., 2008) [see Fig.”
- Coherence–incoherence crossover in the normal state of iron oxypnictides and importance of Hund's rule coupling (2008, background): “In the parent compound, the resistivity exhibits a peak at 150 K [1] followed by a sharp drop, which is due to a structural transition from tetragonal (space group P4/nmm) to orthorhombic structure (space group Cmma) [3, 7] followed by a spin density wave transition [5, 6] at lower temperatures.”