Spin dynamics of the model 2D quantum antiferromagnet CFTD

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dc.creatorRonnow, H. M.
dc.creatorMcMorrow, D. F.
dc.creatorColdea, R.
dc.creatorHarrison, A.
dc.creatorYoungson, I. D.
dc.creatorPerring, T. G.
dc.creatorAeppli, G.
dc.creatorSyljyasen, O.
dc.creatorLefmann, K.
dc.creatorRischel, C.
dc.date2001-01-16
dc.date.accessioned2026-07-07T02:40:05Z
dc.date.available2026-07-07T02:40:05Z
dc.descriptionThe magnetic excitation spectrum in the two-dimensional (2D) S=1/2 Heisenberg antiferromagnet copper deuteroformate tetradeuterate (CFTD) has been measured for temperatures up to T\sim J/2, where J=6.31+-0.02 meV is the 2D exchange coupling. For T\ll J, a dispersion of the zone boundary energy is observed, which is attributed to a wavevector dependent quantum renormalization. At higher temperatures, spin-wave-like excitations persist, but are found to broaden and soften. By combining our data with numerical calculations, and with existing theoretical work, a consistent description of the behaviour of the model system is found over the whole temperature interval investigated.
dc.identifierhttps://arxiv.org/abs/cond-mat/0101238
dc.identifierhttp://arxiv.org/abs/cond-mat/0101238
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17261
dc.subjectCondensed Matter
dc.titleSpin dynamics of the model 2D quantum antiferromagnet CFTD
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