Energy dependence of the spin excitation anisotropy in uniaxial-strained BaFe1.9Ni0.1As2

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dc.citation.firstpage180504(R)en_US
dc.citation.issueNumber18en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber92en_US
dc.contributor.authorSong, Yuen_US
dc.contributor.authorLu, Xingyeen_US
dc.contributor.authorAbernathy, D.L.en_US
dc.contributor.authorTam, David W.en_US
dc.contributor.authorNiedziela, J.L.en_US
dc.contributor.authorTian, Weien_US
dc.contributor.authorLuo, Huiqianen_US
dc.contributor.authorSi, Qimiaoen_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2016-01-15T19:47:52Z
dc.date.available2016-01-15T19:47:52Z
dc.date.issued2015en_US
dc.description.abstractWe use inelastic neutron scattering to study the temperature and energy dependence of the spin excitation anisotropy in uniaxial-strained electron-doped iron pnictide BaFe1.9Ni0.1As2 near optimal superconductivity (Tc=20K). Our work has been motivated by the observation of in-plane resistivity anisotropy in the paramagnetic tetragonal phase of electron-underdoped iron pnictides under uniaxial pressure, which has been attributed to a spin-driven Ising-nematic state or orbital ordering. Here we show that the spin excitation anisotropy, a signature of the spin-driven Ising-nematic phase, exists for energies below ∼60 meV in uniaxial-strained BaFe1.9Ni0.1As2. Since this energy scale is considerably larger than the energy splitting of the dxz and dyz bands of uniaxial-strained Ba(Fe1−xCox)2As2 near optimal superconductivity, spin Ising-nematic correlations are likely the driving force for the resistivity anisotropy and associated electronic nematic correlations.en_US
dc.identifier.citationSong, Yu, Lu, Xingye, Abernathy, D.L., et al.. "Energy dependence of the spin excitation anisotropy in uniaxial-strained BaFe1.9Ni0.1As2." <i>Physical Review B,</i> 92, no. 18 (2015) American Physical Society: 180504(R). http://dx.doi.org/10.1103/PhysRevB.92.180504.
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.92.180504en_US
dc.identifier.urihttps://hdl.handle.net/1911/87852
dc.language.isoengen_US
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.titleEnergy dependence of the spin excitation anisotropy in uniaxial-strained BaFe1.9Ni0.1As2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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