Anisotropic neutron spin resonance in underdoped superconducting NaFe1−xCoxAs

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dc.citation.firstpage140502(R)en_US
dc.citation.issueNumber14en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber90en_US
dc.contributor.authorZhang, Chenglinen_US
dc.contributor.authorSong, Yuen_US
dc.contributor.authorRegnault, L.-P.en_US
dc.contributor.authorSu, Yixien_US
dc.contributor.authorEnderle, M.en_US
dc.contributor.authorKulda, J.en_US
dc.contributor.authorTan, Guotaien_US
dc.contributor.authorSims, Zachary C.en_US
dc.contributor.authorEgami, Takeshien_US
dc.contributor.authorSi, Qimiaoen_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2016-04-29T15:49:33Zen_US
dc.date.available2016-04-29T15:49:33Zen_US
dc.date.issued2014en_US
dc.description.abstractWe use polarized inelastic neutron scattering (INS) to study spin excitations in superconducting NaFe0.985Co0.015As (C15) with static antiferromagnetic (AF) order along the a axis of the orthorhombic structure and NaFe0.935Co0.045As (C45) without AF order. In previous unpolarized INS work, spin excitations in C15 were found to have a dispersive sharp resonance near Er1=3.25 meV and a broad dispersionless mode at Er2=6 meV. Our neutron polarization analysis reveals that the dispersive resonance in C15 is highly anisotropic and polarized along the a and c axes, while the dispersionless mode is isotropic similar to that of C45. Since the a-axis polarized spin excitations of the anisotropic resonance appear below Tc, our data suggests that the itinerant electrons contributing to the magnetism are also coupled to the superconductivity.en_US
dc.identifier.citationZhang, Chenglin, Song, Yu, Regnault, L.-P., et al.. "Anisotropic neutron spin resonance in underdoped superconducting NaFe1−xCoxAs." <i>Physical Review B,</i> 90, no. 14 (2014) American Physical Society: 140502(R). http://dx.doi.org/10.1103/PhysRevB.90.140502.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.90.140502en_US
dc.identifier.urihttps://hdl.handle.net/1911/90381en_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.titleAnisotropic neutron spin resonance in underdoped superconducting NaFe1−xCoxAsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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