Spin fluctuations in LiFeAs observed by neutron scattering

A. E. Taylor; M. J. Pitcher; R. A. Ewings; T. G. Perring; S. J. Clarke; A. T. Boothroyd

doi:10.1103/PhysRevB.83.220514

Spin fluctuations in LiFeAs observed by neutron scattering

Strongly Correlated Electrons 2011-07-21 v1 Superconductivity

Authors: A. E. Taylor , M. J. Pitcher , R. A. Ewings , T. G. Perring , S. J. Clarke , A. T. Boothroyd

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Abstract

We report neutron inelastic scattering measurements on the stoichiometric iron-based superconductor LiFeAs. We find evidence for (i) magnetic scattering consistent with strong antiferromagnetic fluctuations, and (ii) an increase in intensity in the superconducting state at low energies, similar to the resonant magnetic excitation observed in other iron-based superconductors. The results do not support a recent theoretical prediction of spin-triplet p-wave superconductivity in LiFeAs, and instead suggest that the mechanism of superconductivity is similar to that in the other iron-based superconductors.

Keywords

LiFeAs neutron scattering spin fluctuations iron-based superconductor antiferromagnetic fluctuations resonant magnetic excitation

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@article{arxiv.1104.1609,
  title  = {Spin fluctuations in LiFeAs observed by neutron scattering},
  author = {A. E. Taylor and M. J. Pitcher and R. A. Ewings and T. G. Perring and S. J. Clarke and A. T. Boothroyd},
  journal= {arXiv preprint arXiv:1104.1609},
  year   = {2011}
}

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4 pages, 4 figures

Spin fluctuations in LiFeAs observed by neutron scattering

Abstract

Keywords

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