The spin-half Heisenberg antiferromagnet on the square-kagomé lattice: Ground state and low-lying excitations

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dc.creatorRichter, J.
dc.creatorSchulenburg, J.
dc.creatorTomczak, P.
dc.creatorSchmalfuß, D.
dc.date2004-11-26
dc.date.accessioned2026-07-07T03:02:21Z
dc.date.available2026-07-07T03:02:21Z
dc.descriptionWe discuss the ground state and the low-lying excitations of the spin-half Heisenberg antiferromagnet on the two-dimensional square-kagome lattice. This magnetic system belongs to the class of highly frustrated spin systems with an infinite non-trivial degeneracy of the classical ground state as it is known also for the Heisenberg antiferromagnet on the kagome and on the star lattice. The quantum ground state of the spin-half system is a quantum paramagnet likely with a finite spin gap and with a large number of non-magnetic excitations within this gap. The magnetization versus field curve shows plateaux as well as a macroscopic magnetization jump to saturation due to independent localized magnon states.
dc.description14 pages, including 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0411673
dc.identifierhttp://arxiv.org/abs/cond-mat/0411673
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25367
dc.subjectStrongly Correlated Electrons
dc.subjectStatistical Mechanics
dc.titleThe spin-half Heisenberg antiferromagnet on the square-kagomé lattice: Ground state and low-lying excitations
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