Vortex-enhanced alternating order around impurities in antiferromagnets

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dc.creatorVaia, Ruggero
dc.creatorCuccoli, Alessandro
dc.date2008-06-10
dc.date.accessioned2026-07-07T09:43:37Z
dc.date.available2026-07-07T09:43:37Z
dc.descriptionIt has been recently pointed out that the presence of a nonmagnetic impurity in a Heisenberg antiferromagnet generates an alternating order of the surrounding spins which is independent of temperature in a wide range. Quantum Monte Carlo simulations in the two-dimensional $S=1/2$ case confirmed this picture, but showed a counterintuitive enhancement of the alternating order around the Kosterlitz-Thouless transition. We propose here an explanation in terms of the effect of vortex excitations.
dc.description2 pages
dc.identifierhttps://arxiv.org/abs/0806.1713
dc.identifierhttp://arxiv.org/abs/0806.1713
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/162629
dc.subjectStrongly Correlated Electrons
dc.titleVortex-enhanced alternating order around impurities in antiferromagnets
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