2006
DOI: 10.1103/physrevlett.96.077004
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Lightly DopedLa2xSrxCuO4as a Lifshitz Helimagnet

Abstract: We study the static magnetic correlations in lightly doped La2-xSrxCuO4 within the framework of a dipolar frustration model for a canted antiferromagnet. We show that the stability of the canted Néel 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 fi… Show more

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Cited by 22 publications
(26 citation statements)
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“…The observation of static and quasistatic incommensurate peaks in neutron scattering caused a renewal of theoretical interest in the idea of spin spirals in cuprates. [31][32][33][34][35][36][37][38][39] It has been realized that in LSCO, the charge disorder related to a random distribution of Sr ions plays a crucial role and in the insulating state, x Յ 0.055, the disorder qualitatively influences the problem of stability of the spiral. The point is that in the insulating state, the mobile holes are not really mobile, they are trapped in shallow hydrogenlike bound states near Sr ions.…”
Section: Introductionmentioning
confidence: 99%
“…The observation of static and quasistatic incommensurate peaks in neutron scattering caused a renewal of theoretical interest in the idea of spin spirals in cuprates. [31][32][33][34][35][36][37][38][39] It has been realized that in LSCO, the charge disorder related to a random distribution of Sr ions plays a crucial role and in the insulating state, x Յ 0.055, the disorder qualitatively influences the problem of stability of the spiral. The point is that in the insulating state, the mobile holes are not really mobile, they are trapped in shallow hydrogenlike bound states near Sr ions.…”
Section: Introductionmentioning
confidence: 99%
“…For instance, it is well known that the holedoped layered cuprates display puzzling phases between the AFM region and the superconducting dome and that the DM interaction is not completely negligible at low energy. [9][10][11] Notably it would be very interesting to investigate in some detail whether there is a closer connection between our model results and the observation of spin-glass behavior in these systems. 37 The TIAM is very relevant not only in the context of heavy fermions but, e.g., also for isolated atoms on metallic surfaces.…”
Section: Discussionmentioning
confidence: 61%
“…Early papers which found and explored the spin-glass phase in a very similar model are [39,40,47,49]. The main difference is that the papers cited consider the spiral (non-collinear) spin order.…”
Section: Discussionmentioning
confidence: 99%
“…Just as in the disorder-free case, we are particularly interested in possible spin-glass phenomena in doped insulating O(3) antiferromagnets [39,40,[47][48][49] and in the last section we will discuss also the spin-glass phase in such systems.…”
Section: On Disordermentioning
confidence: 99%