Spin dynamics of the quasi two dimensional spin-1/2 quantum magnet Cs_2CuCl_4

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dc.creatorVeillette, Martin Y.
dc.creatorJames, Andrew J. A.
dc.creatorEssler, Fabian H. L.
dc.date2005-06-24
dc.date.accessioned2026-07-07T06:27:11Z
dc.date.available2026-07-07T06:27:11Z
dc.descriptionWe study dynamical properties of the anisotropic triangular quantum antiferromagnet Cs_2CuCl_4. Inelastic neutron scattering measurements have established that the dynamical spin correlations cannot be understood within a linear spin wave analysis. We go beyond linear spin wave theory by taking interactions between magnons into account in a 1/S expansion. We determine the dynamical structure factor and carry out extensive comparisons with experimental data. We find that compared to linear spin wave theory a significant fraction of the scattering intensity is shifted to higher energies and strong scattering continua are present. However, the 1/S expansion fails to account for the experimentally observed large quantum renormalization of the exchange energies.
dc.description13 pages, 11 figures, higher quality figures can be obtained from the authors
dc.identifierhttps://arxiv.org/abs/cond-mat/0506667
dc.identifierhttp://arxiv.org/abs/cond-mat/0506667
dc.identifierPhys. Rev. B 72, 134429 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.134429
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/97342
dc.subjectStrongly Correlated Electrons
dc.titleSpin dynamics of the quasi two dimensional spin-1/2 quantum magnet Cs_2CuCl_4
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