Two spatially separated phases in semiconducting Rb0.8Fe1.5S2

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dc.citation.firstpage125148en_US
dc.citation.issueNumber12en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber90en_US
dc.contributor.authorWang, Mengen_US
dc.contributor.authorTian, Weien_US
dc.contributor.authorValdivia, P.en_US
dc.contributor.authorChi, Songxueen_US
dc.contributor.authorBourret-Courchesne, E.en_US
dc.contributor.authorDai, Pengchengen_US
dc.contributor.authorBirgeneau, R.J.en_US
dc.date.accessioned2016-04-29T15:49:33Zen_US
dc.date.available2016-04-29T15:49:33Zen_US
dc.date.issued2014en_US
dc.description.abstractWe report neutron scattering and transport measurements on semiconducting Rb0.8Fe1.5S2, a compound isostructural and isoelectronic to the well-studied A0.8FeySe2(A=K,Rb,Cs,Tl/K) superconducting systems. Both resistivity and dc susceptibility measurements reveal a magnetic phase transition at T=275K. Neutron diffraction studies show that the 275 K transition originates from a phase with rhombic iron vacancy order which exhibits an in-plane stripe antiferromagnetic ordering below 275 K. In addition, the stripe antiferromagnetic phase interdigitates mesoscopically with an ubiquitous phase with 5√×5√ iron vacancy order. This phase has a magnetic transition at TN=425K and an iron vacancy order-disorder transition at TS=600K. These two different structural phases are closely similar to those observed in the isomorphous Se materials. Based on the close similarities of the in-plane antiferromagnetic structures, moments sizes, and ordering temperatures in semiconducting Rb0.8Fe1.5S2 and K0.81Fe1.58Se2, we argue that the in-plane antiferromagnetic order arises from strong coupling between local moments. Superconductivity, previously observed in the A0.8FeySe2−zSz system, is absent in Rb0.8Fe1.5S2, which has a semiconducting ground state. The implied relationship between stripe and block antiferromagnetism and superconductivity in these materials as well as a strategy for further investigation is discussed in this paper.en_US
dc.identifier.citationWang, Meng, Tian, Wei, Valdivia, P., et al.. "Two spatially separated phases in semiconducting Rb0.8Fe1.5S2." <i>Physical Review B,</i> 90, no. 12 (2014) American Physical Society: 125148. http://dx.doi.org/10.1103/PhysRevB.90.125148.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.90.125148en_US
dc.identifier.urihttps://hdl.handle.net/1911/90380en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
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.en_US
dc.titleTwo spatially separated phases in semiconducting Rb0.8Fe1.5S2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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