Energetic selection of ordered states in a model of the Er2Ti2O7 frustrated pyrochlore XY antiferromagnet

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dc.creatorMcClarty, P. A.
dc.creatorCurnoe, S. H.
dc.creatorGingras, M. J. P.
dc.date2008-10-14
dc.date2008-10-30
dc.date.accessioned2026-07-07T12:47:49Z
dc.date.available2026-07-07T12:47:49Z
dc.descriptionWe consider the possibility that the discrete long-range ordered states of Er2Ti2O7 are selected energetically at the mean field level as an alternative scenario that suggests selection via thermal fluctuations. We show that nearest neighbour exchange interactions alone are not sufficient for this purpose, but that anisotropies arising from excited single ion crystal field states in Er2Ti2O7, together with appropriate anisotropic exchange interactions, can produce the required long range order. However, the effect of the single ion anisotropies is rather weak so we expect thermal or quantum fluctuations, in some guise, to be ultimately important in this material. We reproduce recent experimental results for the variation of magnetic Bragg peak intensities as a function of magnetic field.
dc.description8 pages. 7 figures. Version to be published for Proceedings of HFM2008 Conference. Slight modifications compared to Version #1
dc.identifierhttps://arxiv.org/abs/0810.2483
dc.identifierhttp://arxiv.org/abs/0810.2483
dc.identifierJ. Phys.: Conf. Ser. {145} 012032 (2009)
dc.identifierdoi:10.1088/1742-6596/145/1/012032
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/221852
dc.subjectStatistical Mechanics
dc.titleEnergetic selection of ordered states in a model of the Er2Ti2O7 frustrated pyrochlore XY antiferromagnet
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