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

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).

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V. Juricic, M. B. Silva Neto, C. Morais Smith. 2006-03-29. Lightly doped La(2-x)Sr(x)CuO(4) as a Lifshitz helimagnet. https://doi.org/10.1103/physrevlett.96.077004

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