Magnetic Excitations in the Spin Gap System TlCuCl$_3$

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dc.creatorOosawa, A.
dc.creatorKato, T.
dc.creatorTanaka, H.
dc.creatorUekusa, H.
dc.creatorOhashi, Y.
dc.creatorNakajima, K.
dc.creatorNishi, M.
dc.creatorKakurai, K.
dc.date2000-04-07
dc.date.accessioned2026-07-07T02:37:18Z
dc.date.available2026-07-07T02:37:18Z
dc.descriptionSingle-crystal neutron inelastic scattering was performed in order to investigate the magnetic excitations in the spin gap system TlCuCl$_3$. The constant-${\bf Q}$ energy scan profiles were collected in the $a^*-c^*$ plane. Three excitations are observed for $E{\leq}15$ meV. One of the excitations is identified to be magnetic excitation. The lowest magnetic excitation with $E\sim 0.5$ meV occurs at ${\bf Q}=(1, 0, 1)$, as observed in KCuCl$_3$. The dispersion relation of the magnetic excitation can be fitted to the dispersion formula derived from the weakly coupled dimer model. The intradimer interaction is evaluated as $J=5.23$ meV, which coincides with the value estimated from the susceptibility data. However, one of the interdimer interactions obtained is so large that the weakly coupled dimer model is broken down.
dc.description8 pages, revtex, 10 eps figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0004108
dc.identifierhttp://arxiv.org/abs/cond-mat/0004108
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/16240
dc.subjectCondensed Matter
dc.titleMagnetic Excitations in the Spin Gap System TlCuCl$_3$
dc.typetext

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