Multiple Magnon Modes and Consequences for the Bose-Einstein Condensed Phase in BaCuSi2O6

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dc.creatorRüegg, Ch.
dc.creatorMcMorrow, D. F.
dc.creatorNormand, B.
dc.creatorRonnow, H. M.
dc.creatorSebastian, S. E.
dc.creatorFisher, I. R.
dc.creatorBatista, C. D.
dc.creatorGvasaliya, S.
dc.creatorNiedermayer, Ch.
dc.creatorStahn, J.
dc.date2006-07-19
dc.date2006-11-30
dc.date.accessioned2026-07-07T09:34:20Z
dc.date.available2026-07-07T09:34:20Z
dc.descriptionThe compound BaCuSi2O6 is a quantum magnet with antiferromagnetic dimers of S = 1/2 moments on a quasi-2D square lattice. We have investigated its spin dynamics by inelastic neutron scattering experiments on single crystals with an energy resolution considerably higher than in an earlier study. We observe multiple magnon modes, indicating clearly the presence of magnetically inequivalent dimer sites. This more complex spin Hamiltonian leads to a distinct form of magnon Bose-Einstein condensate (BEC) phase with a spatially modulated condensate amplitude.
dc.description5 pages, 4 figures, to be published in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0607465
dc.identifierhttp://arxiv.org/abs/cond-mat/0607465
dc.identifierPhys. Rev. Lett. 98, 017202 (2007)
dc.identifierdoi:10.1103/PhysRevLett.98.017202
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/159457
dc.subjectStrongly Correlated Electrons
dc.titleMultiple Magnon Modes and Consequences for the Bose-Einstein Condensed Phase in BaCuSi2O6
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