Weaker nematic phase connected to the first order antiferromagnetic phase transition inﾠSrFe2As2ﾠcompared toﾠBaFe2As2

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dc.citation.articleNumber134519en_US
dc.citation.issueNumber13en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber99en_US
dc.contributor.authorTam, David W.en_US
dc.contributor.authorWang, Weiyien_US
dc.contributor.authorZhang, Lien_US
dc.contributor.authorSong, Yuen_US
dc.contributor.authorZhang, Ruien_US
dc.contributor.authorCarr, Scott V.en_US
dc.contributor.authorWalker, H.C.en_US
dc.contributor.authorPerring, Toby G.en_US
dc.contributor.authorAdroja, D.T.en_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2019-08-13T15:19:41Zen_US
dc.date.available2019-08-13T15:19:41Zen_US
dc.date.issued2019en_US
dc.description.abstractUnderstanding the nature of the electronic nematic phase in iron pnictide superconductors is important for elucidating its impact on high-temperature superconductivity. Here we use transport and inelastic neutron scattering to study spin excitations and in-plane resistivity anisotropy in uniaxial pressure detwinned BaFe2As2 and SrFe2As2, the parent compounds of iron pnictide superconductors. While BaFe2As2 exhibits weakly first-order tetragonal-to-orthorhombic structural and antiferromagnetic (AF) phase transitions below Ts>TN≈138K, SrFe2As2 has strongly coupled first-order structural and AF transitions below Ts=TN≈210K. We find that the direct signatures of the nematic phase persist to lower temperatures above the phase transition in the case of SrFe2As2 compared to BaFe2As2. Our findings support the conclusion that the strongly first-order nature of the magnetic transition in SrFe2As2 weakens the nematic phase and resistivity anisotropy in the system.en_US
dc.identifier.citationTam, David W., Wang, Weiyi, Zhang, Li, et al.. "Weaker nematic phase connected to the first order antiferromagnetic phase transition inﾠSrFe2As2ﾠcompared toﾠBaFe2As2." <i>Physical Review B,</i> 99, no. 13 (2019) American Physical Society: https://doi.org/10.1103/PhysRevB.99.134519.en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.99.134519en_US
dc.identifier.urihttps://hdl.handle.net/1911/106230en_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.titleWeaker nematic phase connected to the first order antiferromagnetic phase transition inﾠSrFe2As2ﾠcompared toﾠBaFe2As2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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