Neutron spin resonance as a probe of superconducting gap anisotropy in partially detwinned electron underdoped NaFe0.985Co0.015As

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dc.citation.firstpage104520en_US
dc.citation.issueNumber10en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber91en_US
dc.contributor.authorZhang, Chenglinen_US
dc.contributor.authorPark, J.T.en_US
dc.contributor.authorLu, Xingyeen_US
dc.contributor.authorYu, Rongen_US
dc.contributor.authorLi, Yuen_US
dc.contributor.authorZhang, Wenliangen_US
dc.contributor.authorZhao, Yangen_US
dc.contributor.authorLynn, J.W.en_US
dc.contributor.authorSi, Qimiaoen_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2016-06-10T19:50:42Z
dc.date.available2016-06-10T19:50:42Z
dc.date.issued2015en_US
dc.description.abstractWe use inelastic neutron scattering (INS) to study the spin excitations in partially detwinned NaFe0.985Co0.015As which has coexisting static antiferromagnetic (AF) order and superconductivity (Tc=15 K, TN=30 K). In previous INS work on a twinned sample, spin excitations formed a dispersive sharp resonance near Er1=3.25ﾠmeV and a broad dispersionless mode at Er1=6 meV at the AF ordering wave vector QAF=Q1=(1,0) and its twinned domain Q2=(0,1). For partially detwinned NaFe0.985Co0.015As with the static AF order mostly occurring at QAF=(1,0), we still find a double resonance at both wave vectors with similar intensity. Since Q1=(1,0) characterizes the explicit breaking of the spin rotational symmetry associated with the AF order, these results indicate that the double resonance cannot be due to the static and fluctuating AF orders but originate from the superconducting gap anisotropy.en_US
dc.identifier.citationZhang, Chenglin, Park, J.T., Lu, Xingye, et al.. "Neutron spin resonance as a probe of superconducting gap anisotropy in partially detwinned electron underdoped NaFe0.985Co0.015As." <i>Physical Review B,</i> 91, no. 10 (2015) American Physical Society: 104520. http://dx.doi.org/10.1103/PhysRevB.91.104520.
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevB.91.104520en_US
dc.identifier.urihttps://hdl.handle.net/1911/90505
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.titleNeutron spin resonance as a probe of superconducting gap anisotropy in partially detwinned electron underdoped NaFe0.985Co0.015Asen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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