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dc.contributor.authorHamp, J
dc.contributor.authorMoessner, R
dc.contributor.authorCastelnovo, Claudio
dc.date.accessioned2018-12-08T00:31:33Z
dc.date.available2018-12-08T00:31:33Z
dc.date.issued2018-10-29
dc.identifier.issn2469-9950
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286551
dc.description.abstractWe study equilibration and ordering in the classical dipolar kagome Ising antiferromagnet, which we show behaves as a disorder-free fragile spin glass. By identifying an appropriate order parameter, we demonstrate a transition to the ordered state proposed by Chioar et al. [Phys. Rev. B 93, 214410 (2016)] with a 12-site unit cell that breaks time-reversal and sublattice symmetries, and further provide evidence that the nature of the transition is first order. Upon approaching the transition, the spin dynamics slow dramatically. The system readily falls out of equilibrium, overshooting the transition and entering a supercooled liquid regime. Using extensive Monte Carlo simulations, we show that the system exhibits super-Arrhenius behaviour above the ordering transition. The relaxation time diverges according to a Vogel-Fulcher form at a finite `glass transition' temperature in the supercooled regime. Such behaviour, characteristic of fragile glasses, is particularly remarkable as the model is free of quenched disorder, does not straightforwardly conform to the avoided criticality paradigm, and is simple and eminently realisable in engineered nanomagnetic arrays.
dc.publisherAmerican Physical Society (APS)
dc.titleSupercooling and fragile glassiness in a dipolar kagome Ising magnet
dc.typeArticle
prism.issueIdentifier14
prism.publicationDate2018
prism.publicationNamePhysical Review B
prism.volume98
dc.identifier.doi10.17863/CAM.33861
dcterms.dateAccepted2018-09-26
rioxxterms.versionofrecord10.1103/PhysRevB.98.144439
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-10-29
dc.contributor.orcidCastelnovo, Claudio [0000-0003-1752-6343]
dc.identifier.eissn2469-9969
dc.publisher.urlhttp://dx.doi.org/10.1103/PhysRevB.98.144439
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/K028960/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P034616/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M007065/1)
cam.issuedOnline2018-10-29
rioxxterms.freetoread.startdate2019-10-29


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