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.accessioned2016-04-29T15:49:33Z
dc.date.available2016-04-29T15:49:33Z
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.
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.90.140502en_US
dc.identifier.urihttps://hdl.handle.net/1911/90381
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.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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