Disentangling superconducting and magnetic orders in NaFe1−xNixAs using muon spin rotation

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dc.citation.articleNumber224508en_US
dc.citation.issueNumber22en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber97en_US
dc.contributor.authorCheung, Sky C.en_US
dc.contributor.authorGuguchia, Zuraben_US
dc.contributor.authorFrandsen, Benjamin A.en_US
dc.contributor.authorGong, Zizhouen_US
dc.contributor.authorYamakawa, Kohtaroen_US
dc.contributor.authorAlmeida, Dalson E.en_US
dc.contributor.authorOnuorah, Ifeanyi J.en_US
dc.contributor.authorBonfá, Pietroen_US
dc.contributor.authorMiranda, Eduardoen_US
dc.contributor.authorWang, Weiyien_US
dc.contributor.authorTam, David W.en_US
dc.contributor.authorSong, Yuen_US
dc.contributor.authorCao, Chongdeen_US
dc.contributor.authorCai, Yipengen_US
dc.contributor.authorHallas, Alannah M.en_US
dc.contributor.authorWilson, Murray N.en_US
dc.contributor.authorMunsie, Timothy J.S.en_US
dc.contributor.authorLuke, Graemeen_US
dc.contributor.authorChen, Bijuanen_US
dc.contributor.authorDai, Guangyangen_US
dc.contributor.authorJin, Changqingen_US
dc.contributor.authorGuo, Shenglien_US
dc.contributor.authorNing, Fanlongen_US
dc.contributor.authorFernandes, Rafael M.en_US
dc.contributor.authorDe Renzi, Robertoen_US
dc.contributor.authorDai, Pengchengen_US
dc.contributor.authorUemura, Yasutomo J.en_US
dc.date.accessioned2018-09-26T14:52:39Zen_US
dc.date.available2018-09-26T14:52:39Zen_US
dc.date.issued2018en_US
dc.description.abstractMuon spin rotation and relaxation studies have been performed on a “111” family of iron-based superconductors, NaFe1−xNixAs, using single crystalline samples with Ni concentrations x=0, 0.4, 0.6, 1.0, 1.3, and 1.5%. Static magnetic order was characterized by obtaining the temperature and doping dependences of the local ordered magnetic moment size and the volume fraction of the magnetically ordered regions. For x=0 and 0.4%, a transition to a nearly-homogeneous long range magnetically ordered state is observed, while for x≳0.4% magnetic order becomes more disordered and is completely suppressed for x=1.5%. The magnetic volume fraction continuously decreases with increasing x. Development of superconductivity in the full volume is inferred from Meissner shielding results for x≳0.4%. The combination of magnetic and superconducting volumes implies that a spatially-overlapping coexistence of magnetism and superconductivity spans a large region of the T−x phase diagram for NaFe1−xNixAs. A strong reduction of both the ordered moment size and the volume fraction is observed below the superconducting TC for x=0.6, 1.0, and 1.3%, in contrast to other iron pnictides in which one of these two parameters exhibits a reduction below TC, but not both. The suppression of magnetic order is further enhanced with increased Ni doping, leading to a reentrant nonmagnetic state below TC for x=1.3%. The reentrant behavior indicates an interplay between antiferromagnetism and superconductivity involving competition for the same electrons. These observations are consistent with the sign-changing s± superconducting state, which is expected to appear on the verge of microscopic coexistence and phase separation with magnetism. We also present a universal linear relationship between the local ordered moment size and the antiferromagnetic ordering temperature TN across a variety of iron-based superconductors. We argue that this linear relationship is consistent with an itinerant-electron approach, in which Fermi surface nesting drives antiferromagnetic ordering. In studies of superconducting properties, we find that the T=0 limit of superfluid density follows the linear trend observed in underdoped cuprates when plotted against TC. This paper also includes a detailed theoretical prediction of the muon stopping sites and provides comparisons with experimental results.en_US
dc.identifier.citationCheung, Sky C., Guguchia, Zurab, Frandsen, Benjamin A., et al.. "Disentangling superconducting and magnetic orders in NaFe1−xNixAs using muon spin rotation." <i>Physical Review B,</i> 97, no. 22 (2018) American Physical Society: https://doi.org/10.1103/PhysRevB.97.224508.en_US
dc.identifier.digitalPhysRevB.97.224508en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.97.224508en_US
dc.identifier.urihttps://hdl.handle.net/1911/102703en_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.titleDisentangling superconducting and magnetic orders in NaFe1−xNixAs using muon spin rotationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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