Incommensurate spin-density wave order in electron-doped BaFe2As2 superconductors

D. K. Pratt; M. G. Kim; A. Kreyssig; Y. B. Lee; G. S. Tucker; A. Thaler; W. Tian; J. L. Zarestky; S. L. Bud'ko; P. C. Canfield; B. N. Harmon; A. I. Goldman; R. J. McQueeney

doi:10.1103/PhysRevLett.106.257001

Incommensurate spin-density wave order in electron-doped BaFe2As2 superconductors

Superconductivity 2011-06-23 v1 Strongly Correlated Electrons

Authors: D. K. Pratt , M. G. Kim , A. Kreyssig , Y. B. Lee , G. S. Tucker , A. Thaler , W. Tian , J. L. Zarestky , S. L. Bud'ko , P. C. Canfield , B. N. Harmon , A. I. Goldman , R. J. McQueeney

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Abstract

Neutron diffraction studies of Ba(Fe[1-x]Co[x])2As2 reveal that commensurate antiferromagnetic order gives way to incommensurate magnetic order for Co compositions between 0.056 < x < 0.06. The incommensurability has the form of a small transverse splitting (0, +-e, 0) from the nominal commensurate antiferromagnetic propagation vector Q[AFM] = (1, 0, 1) (in orthorhombic notation) where e = 0.02-0.03 and is composition dependent. The results are consistent with the formation of a spin-density wave driven by Fermi surface nesting of electron and hole pockets and confirm the itinerant nature of magnetism in the iron arsenide superconductors.

Keywords

spin-density wave electron-doped superconductors BaFe2As2 neutron diffraction incommensurate order Fermi surface nesting itinerant magnetism

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@article{arxiv.1104.0717,
  title  = {Incommensurate spin-density wave order in electron-doped BaFe2As2 superconductors},
  author = {D. K. Pratt and M. G. Kim and A. Kreyssig and Y. B. Lee and G. S. Tucker and A. Thaler and W. Tian and J. L. Zarestky and S. L. Bud'ko and P. C. Canfield and B. N. Harmon and A. I. Goldman and R. J. McQueeney},
  journal= {arXiv preprint arXiv:1104.0717},
  year   = {2011}
}

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14 pages, 3 figures

Incommensurate spin-density wave order in electron-doped BaFe2As2 superconductors

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