Effective action of the weakly doped t-J model and spin-wave excitations in the spin-glass phase of La_{2-x}Sr_xCuO_4

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dc.creatorLuscher, Andreas
dc.creatorMilstein, Alexander I.
dc.creatorSushkov, Oleg P.
dc.date2007-03-07
dc.date.accessioned2026-07-07T08:13:11Z
dc.date.available2026-07-07T08:13:11Z
dc.descriptionWe derive the low-energy effective field theory of the extended t-J model in the regime of light doping. The action includes a previously unknown Berry phase term, which is discussed in detail. We use this effective field theory to calculate spin-wave excitations in the disordered spin spiral state of La_{2-x}Sr_xCuO_4 (the spin-glass phase). We predict an excitation spectrum with two distinct branches: The in-plane mode has the usual linear spin-wave dispersion and the out-of-plane mode shows non-trivial doping dependent features. We also calculate the intensities for inelastic neutron scattering in these modes.
dc.description9 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0703172
dc.identifierhttp://arxiv.org/abs/cond-mat/0703172
dc.identifierPhys. Rev. B 75, 235120 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.235120
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/132715
dc.subjectStrongly Correlated Electrons
dc.titleEffective action of the weakly doped t-J model and spin-wave excitations in the spin-glass phase of La_{2-x}Sr_xCuO_4
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