Spin fluctuations in LiFeAs observed by neutron scattering

Details Spin fluctuations in LiFeAs observed by neutron scattering Spin fluctuations in LiFeAs observed by neutron scattering

2011-04-08

arxiv.org/abs/1104.1609v1

Phys. Rev. B 83, 220514(R) 2011

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.83.220514

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.

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