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Magnetic order close to superconductivity in the iron-based layered LaO1-xF x FeAs systems

Author

Listed:
  • Clarina de la Cruz

    (The University of Tennessee, Knoxville, Tennessee 37996-1200, USA
    Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA)

  • Q. Huang

    (NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA)

  • J. W. Lynn

    (NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA)

  • Jiying Li

    (NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA
    University of Maryland, College Park, Maryland 20742-6393, USA)

  • W. Ratcliff II

    (NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA)

  • J. L. Zarestky

    (Iowa State University, Ames, Iowa 50011, USA)

  • H. A. Mook

    (Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA)

  • G. F. Chen

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • J. L. Luo

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • N. L. Wang

    (Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences)

  • Pengcheng Dai

    (The University of Tennessee, Knoxville, Tennessee 37996-1200, USA
    Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA)

Abstract

Oxypnictide superconductors: Magnetic order Much like high-Tc copper oxides, superconductivity in the newly discovered the rare-earth iron-based oxide systems is derived from either electron or hole doping of their non-superconducting parent compounds. The parent LaOFeAs material is metallic but shows anomalies near 150 K in both resistivity and d.c. magnetic susceptibility. While optical conductivity and theoretical calculations suggest that LaOFeAs exhibits a spin-density-wave (SDW) instability that is suppressed by doping electrons to form superconductivity, there has been no direct evidence of SDW order. de la Cruz et al. report neutron-scattering experiments that demonstrate that LaOFeAs undergoes an abrupt structural distortion below ∼150 K, followed by the development of long-range SDW-type antiferromagnetic order at ∼137 K with a small moment but simple magnetic structure. Doping the system with fluorine suppresses both the magnetic order and structural distortion in favour of superconductivity. Therefore, like high-Tc copper oxides, the superconducting regime in these iron-based materials occurs in close proximity to a long-range ordered antiferromagnetic ground state.

Suggested Citation

  • Clarina de la Cruz & Q. Huang & J. W. Lynn & Jiying Li & W. Ratcliff II & J. L. Zarestky & H. A. Mook & G. F. Chen & J. L. Luo & N. L. Wang & Pengcheng Dai, 2008. "Magnetic order close to superconductivity in the iron-based layered LaO1-xF x FeAs systems," Nature, Nature, vol. 453(7197), pages 899-902, June.
    • Handle: RePEc:nat:nature:v:453:y:2008:i:7197:d:10.1038_nature07057
    DOI: 10.1038/nature07057
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    Cited by:

    1. Jaume Meseguer-Sánchez & Catalin Popescu & José Luis García-Muñoz & Hubertus Luetkens & Grigol Taniashvili & Efrén Navarro-Moratalla & Zurab Guguchia & Elton J. G. Santos, 2021. "Coexistence of structural and magnetic phases in van der Waals magnet CrI3," Nature Communications, Nature, vol. 12(1), pages 1-7, December.

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