Neutron spin resonance as a probe of superconducting gap anisotropy in partially detwinned electron underdoped ${\mathrm{NaFe}}_{0.985}{\mathrm{Co}}_{0.015}\mathrm{As}$

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dc.citation.articleNumber104520
dc.citation.issueNumber10
dc.citation.journalTitlePhysical Review B
dc.citation.volumeNumber91
dc.contributor.authorZhang, Chenglin
dc.contributor.authorPark, J.T.
dc.contributor.authorLu, Xingye
dc.contributor.authorYu, Rong
dc.contributor.authorLi, Yu
dc.contributor.authorZhang, Wenliang
dc.contributor.authorZhao, Yang
dc.contributor.authorLynn, J.W.
dc.contributor.authorSi, Qimiao
dc.contributor.authorDai, Pengcheng
dc.date.accessioned2018-12-12T18:59:21Z
dc.date.available2018-12-12T18:59:21Z
dc.date.issued2015
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=3.25 meV 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.
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 ${\mathrm{NaFe}}_{0.985}{\mathrm{Co}}_{0.015}\mathrm{As}$." <i>Physical Review B,</i> 91, no. 10 (2015) American Physical Society: https://doi.org/10.1103/PhysRevB.91.104520.
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.91.104520
dc.identifier.urihttps://hdl.handle.net/1911/103838
dc.language.isoeng
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 ${\mathrm{NaFe}}_{0.985}{\mathrm{Co}}_{0.015}\mathrm{As}$
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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