Magnetic Excitations of the Spin Gap System TlCuCl$_3$

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dc.creatorOosawa, A.
dc.creatorKato, T.
dc.creatorTanaka, H.
dc.creatorKakurai, K.
dc.creatorMueller, M.
dc.creatorMikeska, H. -J.
dc.date2001-08-08
dc.date2002-01-28
dc.date.accessioned2026-07-07T02:42:22Z
dc.date.available2026-07-07T02:42:22Z
dc.descriptionTlCuCl$_3$ has a singlet ground state with the excitation gap $Δ=0.65$ meV. The magnetic excitations in TlCuCl$_3$ have been investigated by means of neutron inelastic scattering experiments. The constant-$\it{\pmb Q}$ energy scan profiles were collected in the $a^*-c^*$ plane. A well-defined single magnetic excitation mode was observed. The dispersion relations along four different directions were determined. The lowest excitation occurs at ${\it{\pmb Q}}=(h, 0, l)$ with integer $h$ and odd $l$, as observed in KCuCl$_3$. A cluster series expansion up to the sixth order was applied to analyze the dispersion relations, and the individual exchange interactions were evaluated. It was demonstrated that TlCuCl$_3$ is a strongly coupled spin-dimer system.
dc.description20 pages, 6 figures, 12 eps files, revtex style
dc.identifierhttps://arxiv.org/abs/cond-mat/0108130
dc.identifierhttp://arxiv.org/abs/cond-mat/0108130
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/18115
dc.subjectStrongly Correlated Electrons
dc.titleMagnetic Excitations of the Spin Gap System TlCuCl$_3$
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