Exact eigenstates of highly frustrated spin lattices probed in high fields

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dc.creatorSchnack, J.
dc.creatorSchmidt, H. -J.
dc.creatorHonecker, A.
dc.creatorSchulenburg, J.
dc.creatorRichter, J.
dc.date2006-06-15
dc.date2006-07-20
dc.date.accessioned2026-07-07T08:22:49Z
dc.date.available2026-07-07T08:22:49Z
dc.descriptionStrongly frustrated antiferromagnets such as the magnetic molecule {Mo72Fe30}, the kagome, or the pyrochlore lattice exhibit a variety of fascinating properties like low-lying singlets, magnetization plateaus as well as magnetization jumps. During recent years exact many-body eigenstates could be constructed for several of these spin systems. These states become ground states in high magnetic fields, and they also lead to exotic behavior. A key concept to an understanding of these properties is provided by independent localized magnons. The energy eigenvalue of these n-magnon states scales linearly with the number n of independent magnons and thus with the total magnetic quantum number M=Ns-n. In an applied field this results in a giant magnetization jump which constitutes a new macroscopic quantum effect. It will be demonstrated that this behavior is accompanied by a massive degeneracy, an extensive (T=0)-entropy, and thus a large magnetocaloric effect at the saturation field. The connection to flat band ferromagnetism will be outlined.
dc.description4 pages, submitted to the proceedings of the Yamada Conference LX on Research in High Magnetic Fields, August 16-19, 2006 Sendai, Japan
dc.identifierhttps://arxiv.org/abs/cond-mat/0606401
dc.identifierhttp://arxiv.org/abs/cond-mat/0606401
dc.identifierJ. Phys. Confer. Ser. 51 (2006) 43
dc.identifierdoi:10.1088/1742-6596/51/1/007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/135780
dc.subjectStrongly Correlated Electrons
dc.titleExact eigenstates of highly frustrated spin lattices probed in high fields
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