Low energy, quasi-one-dimensional, spin dynamics in charge-ordered La(2-x)Sr(x)NiO(4)

P. G. Freeman; D. Prabhakaran; K. Nakajima; A. Stunault; M. Enderle; C. Niedermayer; C. Niedermayer; K. Yamada; A. T. Boothroyd

doi:10.1103/PhysRevB.83.094414

Low energy, quasi-one-dimensional, spin dynamics in charge-ordered La(2-x)Sr(x)NiO(4)

Strongly Correlated Electrons 2011-03-17 v1

Authors: P. G. Freeman , D. Prabhakaran , K. Nakajima , A. Stunault , M. Enderle , C. Niedermayer , C. Niedermayer , K. Yamada , A. T. Boothroyd

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Abstract

The low energy spin excitations of La(2-x)Sr(x)NiO(4), x = 0.275 and 1/3, have been investigated by unpolarized- and polarized-inelastic neutron scattering from single crystals. A pattern of magnetic diffuse scattering is observed in both compositions, and is consistent with quasi-one-dimensional AFM spin correlations along the charge stripes. Analysis of the energy lineshape for x = 1/3 indicates that the diffuse scattering is inelastic with a characteristic energy of 1.40 +/- 0.07 meV. There is no discernible difference between the diffuse scattering from x = 0.275 and x = 1/3, suggesting that it is an intrinsic property of the charge stripes.

Keywords

spin dynamics charge stripes La2-xSrxNiO4 inelastic neutron scattering quasi-one-dimensional antiferromagnetic correlations

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@article{arxiv.1101.0619,
  title  = {Low energy, quasi-one-dimensional, spin dynamics in charge-ordered La(2-x)Sr(x)NiO(4)},
  author = {P. G. Freeman and D. Prabhakaran and K. Nakajima and A. Stunault and M. Enderle and C. Niedermayer and C. Niedermayer and K. Yamada and A. T. Boothroyd},
  journal= {arXiv preprint arXiv:1101.0619},
  year   = {2011}
}

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7 pages, 7 figures

Low energy, quasi-one-dimensional, spin dynamics in charge-ordered La(2-x)Sr(x)NiO(4)

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