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dc.contributor.authorSong, Yu
Lu, Xingye
Abernathy, D.L.
Tam, David W.
Niedziela, J.L.
Tian, Wei
Luo, Huiqian
Si, Qimiao
Dai, Pengcheng
dc.date.accessioned 2016-01-15T19:47:52Z
dc.date.available 2016-01-15T19:47:52Z
dc.date.issued 2015
dc.identifier.citation Song, Yu, Lu, Xingye, Abernathy, D.L., et al.. "Energy dependence of the spin excitation anisotropy in uniaxial-strained BaFe1.9Ni0.1As2." Physical Review B, 92, no. 18 (2015) American Physical Society: 180504(R). http://dx.doi.org/10.1103/PhysRevB.92.180504.
dc.identifier.urihttps://hdl.handle.net/1911/87852
dc.description.abstract We 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.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Article 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.title Energy dependence of the spin excitation anisotropy in uniaxial-strained BaFe1.9Ni0.1As2
dc.type Journal article
dc.contributor.funder National Science Foundation
dc.contributor.funder Welch Foundation
dc.contributor.funder Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
dc.citation.journalTitle Physical Review B
dc.citation.volumeNumber 92
dc.citation.issueNumber 18
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.92.180504
dc.identifier.grantID DMR-1362219 (National Science Foundation)
dc.identifier.grantID DMR-1436006 (National Science Foundation)
dc.identifier.grantID C-1839 (Welch Foundation)
dc.identifier.grantID C-1411 (Welch Foundation)
dc.identifier.grantID DMR-1309531 (National Science Foundation)
dc.type.publication publisher version
dc.citation.firstpage 180504(R)


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