Spin waves and spatially anisotropic exchange interactions in the $S=2$ stripe antiferromagnet ${\mathrm{Rb}}_{0.8}{\mathrm{Fe}}_{1.5}{\mathrm{S}}_{2}$

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dc.citation.articleNumber041109(R)
dc.citation.issueNumber4
dc.citation.journalTitlePhysical Review B
dc.citation.volumeNumber92
dc.contributor.authorWang, Meng
dc.contributor.authorValdivia, P.
dc.contributor.authorYi, Ming
dc.contributor.authorChen, J.X.
dc.contributor.authorZhang, W.L.
dc.contributor.authorEwings, R.A.
dc.contributor.authorPerring, T.G.
dc.contributor.authorZhao, Yang
dc.contributor.authorHarriger, L.W.
dc.contributor.authorLynn, J.W.
dc.contributor.authorBourret-Courchesne, E.
dc.contributor.authorDai, Pengcheng
dc.contributor.authorLee, D.H.
dc.contributor.authorYao, D. X.
dc.contributor.authorBirgeneau, R.J.
dc.date.accessioned2018-12-12T18:59:21Z
dc.date.available2018-12-12T18:59:21Z
dc.date.issued2015
dc.description.abstractAn inelastic neutron scattering study of the spin waves corresponding to the stripe antiferromagnetic order in insulating Rb0.8Fe1.5S2 throughout the Brillouin zone is reported. The spin wave spectra are well described by a Heisenberg Hamiltonian with anisotropic in-plane exchange interactions. Integrating the ordered moment and the spin fluctuations results in a total moment squared of 27.6±4.2μ2B/Fe, consistent with S≈2. Unlike XFe2As2 (X=Ca, Sr, and Ba), where the itinerant electrons have a significant contribution, our data suggest that this stripe antiferromagnetically ordered phase in Rb0.8Fe1.5S2 is a Mott-like insulator with fully localized 3d electrons and a high-spin ground state configuration. Nevertheless, the anisotropic exchange couplings appear to be universal in the stripe phase of Fe pnictides and chalcogenides.
dc.identifier.citationWang, Meng, Valdivia, P., Yi, Ming, et al.. "Spin waves and spatially anisotropic exchange interactions in the $S=2$ stripe antiferromagnet ${\mathrm{Rb}}_{0.8}{\mathrm{Fe}}_{1.5}{\mathrm{S}}_{2}$." <i>Physical Review B,</i> 92, no. 4 (2015) American Physical Society: https://doi.org/10.1103/PhysRevB.92.041109.
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.92.041109
dc.identifier.urihttps://hdl.handle.net/1911/103839
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleSpin waves and spatially anisotropic exchange interactions in the $S=2$ stripe antiferromagnet ${\mathrm{Rb}}_{0.8}{\mathrm{Fe}}_{1.5}{\mathrm{S}}_{2}$
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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