What are spin currents in Heisenberg magnets?

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dc.creatorSchuetz, Florian
dc.creatorKopietz, Peter
dc.creatorKollar, Marcus
dc.date2004-05-14
dc.date2004-11-16
dc.date.accessioned2026-07-07T02:58:09Z
dc.date.available2026-07-07T02:58:09Z
dc.descriptionWe discuss the proper definition of the spin current operator in Heisenberg magnets subject to inhomogeneous magnetic fields. We argue that only the component of the naive "current operator" J_ij S_i x S_j in the plane spanned by the local order parameters <S_i> and <S_j> is related to real transport of magnetization. Within a mean field approximation or in the classical ground state the spin current therefore vanishes. Thus, finite spin currents are a direct manifestation of quantum correlations in the system.
dc.description4 pages, 1 figure, published version
dc.identifierhttps://arxiv.org/abs/cond-mat/0405312
dc.identifierhttp://arxiv.org/abs/cond-mat/0405312
dc.identifierEur. Phys. J. B 41, 557 (2004)
dc.identifierdoi:10.1140/epjb/e2004-00348-9
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23961
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleWhat are spin currents in Heisenberg magnets?
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