Zero-energy states and fragmentation of spin in the easy-plane antiferromagnet on a honeycomb lattice

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dc.creatorHerbut, Igor F.
dc.date2007-04-18
dc.date2007-11-16
dc.date.accessioned2026-07-07T13:16:07Z
dc.date.available2026-07-07T13:16:07Z
dc.descriptionThe core of the vortex in the Neel order parameter for an easy-plane antiferromagnet on honeycomb lattice is demonstrated to bind two zero-energy states. Remarkably, a single electron occupying this mid-gap band has its spin fragmented between the two sublattices: Whereas it yields a vanishing total magnetization it shows a finite Neel order, orthogonal to the one of the assumed background. The requisite easy-plane anisotropy may be introduced by a magnetic field parallel to the graphene layer, for example. The results are relevant for spin-1/2 fermions on graphene's or optical honeycomb lattice, in the strongly interacting regime.
dc.description4 pages; cosmetic changes; published version
dc.identifierhttps://arxiv.org/abs/0704.2234
dc.identifierhttp://arxiv.org/abs/0704.2234
dc.identifierPhys. Rev. Lett. vol. 99, 206404 (2007)
dc.identifierdoi:10.1103/PhysRevLett.99.206404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230685
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.subjectHigh Energy Physics - Theory
dc.titleZero-energy states and fragmentation of spin in the easy-plane antiferromagnet on a honeycomb lattice
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