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Lightly doped La(2-x)Sr(x)CuO(4) as a Lifshitz helimagnet

Strongly Correlated Electrons 2007-05-23 v3
Authors: V. Juricic , M. B. Silva Neto , C. Morais Smith
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Abstract

We study the static magnetic correlations in lightly doped La(2-x)Sr(x)CuO(4) within the framework of a dipolar frustration model for a canted antiferromagnet. We show that the stability of the canted Neel state for x<2% is due to the Dzyaloshinskii-Moriya and XY anisotropies. For higher doping the ground state is unstable towards a helicoidal magnetic phase where the transverse components of the staggered magnetization rotate in a plane perpendicular to the orthorhombic b-axis. Our theory reconciles, for the first time, the incommensurate peaks observed in elastic neutron scattering with Raman and magnetic susceptibility experiments in La(2-x)Sr(x)CuO(4).

Keywords

helimagnet La2-xSrxCuO4 dipolar frustration canted antiferromagnet Dzyaloshinskii-Moriya interaction incommensurate peaks

Cite

@article{arxiv.cond-mat/0510312,
  title  = {Lightly doped La(2-x)Sr(x)CuO(4) as a Lifshitz helimagnet},
  author = {V. Juricic and M. B. Silva Neto and C. Morais Smith},
  journal= {arXiv preprint arXiv:cond-mat/0510312},
  year   = {2007}
}

Comments

4 pages, 2 figures, published in Phys. Rev. Lett

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