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

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dc.citation.firstpage125148
dc.citation.issueNumber12
dc.citation.journalTitlePhysical Review B
dc.citation.volumeNumber90
dc.contributor.authorWang, Meng
dc.contributor.authorTian, Wei
dc.contributor.authorValdivia, P.
dc.contributor.authorChi, Songxue
dc.contributor.authorBourret-Courchesne, E.
dc.contributor.authorDai, Pengcheng
dc.contributor.authorBirgeneau, R.J.
dc.date.accessioned2016-04-29T15:49:33Z
dc.date.available2016-04-29T15:49:33Z
dc.date.issued2014
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.
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.
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.90.125148
dc.identifier.urihttps://hdl.handle.net/1911/90380
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.titleTwo spatially separated phases in semiconducting Rb0.8Fe1.5S2
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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