Electron doping evolution of the neutron spin resonance in NaFe1−xCoxAs

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dc.citation.articleNumber174522
dc.citation.issueNumber17en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber93en_US
dc.contributor.authorZhang, Chenglinen_US
dc.contributor.authorLv, Weichengen_US
dc.contributor.authorTan, Guotaien_US
dc.contributor.authorSong, Yuen_US
dc.contributor.authorCarr, Scott V.en_US
dc.contributor.authorChi, Songxueen_US
dc.contributor.authorMatsuda, M.en_US
dc.contributor.authorChristianson, A.D.en_US
dc.contributor.authorFernandez-Baca, J.A.en_US
dc.contributor.authorHarriger, L.W.en_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2017-05-04T19:43:54Z
dc.date.available2017-05-04T19:43:54Z
dc.date.issued2016en_US
dc.description.abstractNeutron spin resonance, a collective magnetic excitation coupled to superconductivity, is one of the most prominent features shared by a broad family of unconventional superconductors including copper oxides, iron pnictides, and heavy fermions. In this paper, we study the doping evolution of the resonances in NaFe1−xCoxAs covering the entire superconducting dome. For the underdoped compositions, two resonance modes coexist. As doping increases, the low-energy resonance gradually loses its spectral weight to the high-energy one but remains at the same energy. By contrast, in the overdoped regime we only find one single resonance, which acquires a broader width in both energy and momentum but retains approximately the same peak position even when Tc drops by nearly a half compared to optimal doping. These results suggest that the energy of the resonance in electron overdoped NaFe1−xCoxAs is neither simply proportional to Tc nor the superconducting gap but is controlled by the multiorbital character of the system and doped impurity scattering effect.en_US
dc.identifier.citationZhang, Chenglin, Lv, Weicheng, Tan, Guotai, et al.. "Electron doping evolution of the neutron spin resonance in NaFe1−xCoxAs." <i>Physical Review B,</i> 93, no. 17 (2016) American Physical Society: https://doi.org/10.1103/PhysRevB.93.174522.
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.93.174522en_US
dc.identifier.urihttps://hdl.handle.net/1911/94181
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.titleElectron doping evolution of the neutron spin resonance in NaFe1−xCoxAsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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