Critical phenomena in a highly constrained classical spin system: Neel ordering from the Coulomb phase

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dc.creatorPickles, T. S.
dc.creatorSaunders, T. E.
dc.creatorChalker, J. T.
dc.date2007-08-28
dc.date.accessioned2026-07-07T10:14:21Z
dc.date.available2026-07-07T10:14:21Z
dc.descriptionMany classical, geometrically frustrated antiferromagnets have macroscopically degenerate ground states. In a class of three-dimensional systems, the set of degenerate ground states has power-law correlations and is an example of a Coulomb phase. We investigate Neel ordering from such a Coulomb phase, induced by weak additional interactions that lift the degeneracy. We show that the critical point belongs to a universality class that is different from the one for the equivalent transition out of the paramagnetic phase, and that it is characterised by effective long-range interactions; alternatively, ordering may be discontinuous. We suggest that a transition of this type may be realised by applying uniaxial stress to a pyrochlore antiferromagnet.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0708.3791
dc.identifierhttp://arxiv.org/abs/0708.3791
dc.identifierEurophysics Letters 84 36002 (2008)
dc.identifierdoi:10.1209/0295-5075/84/36002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172853
dc.subjectStatistical Mechanics
dc.subjectStrongly Correlated Electrons
dc.titleCritical phenomena in a highly constrained classical spin system: Neel ordering from the Coulomb phase
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