Nematic Quantum Critical Fluctuations in BaFe2−xNixAs2

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dc.citation.articleNumber157002en_US
dc.citation.issueNumber15en_US
dc.citation.journalTitlePhysical Review Lettersen_US
dc.citation.volumeNumber117en_US
dc.contributor.authorLiu, Zhaoyuen_US
dc.contributor.authorGu, Yanhongen_US
dc.contributor.authorZhang, Weien_US
dc.contributor.authorGong, Dongliangen_US
dc.contributor.authorZhang, Wenliangen_US
dc.contributor.authorXie, Taoen_US
dc.contributor.authorLu, Xingyeen_US
dc.contributor.authorMa, Xiaoyanen_US
dc.contributor.authorZhang, Xiaotianen_US
dc.contributor.authorZhang, Ruien_US
dc.contributor.authorZhu, Junen_US
dc.contributor.authorRen, Congen_US
dc.contributor.authorShan, Leien_US
dc.contributor.authorQiu, Xianggangen_US
dc.contributor.authorDai, Pengchengen_US
dc.contributor.authorYang, Yi-fengen_US
dc.contributor.authorLuo, Huiqianen_US
dc.contributor.authorLi, Shiliangen_US
dc.date.accessioned2017-01-27T22:23:42Zen_US
dc.date.available2017-01-27T22:23:42Zen_US
dc.date.issued2016en_US
dc.description.abstractWe have systematically studied the nematic fluctuations in the electron-doped iron-based superconductor BaFe2−xNixAs2 by measuring the in-plane resistance change under uniaxial pressure. While the nematic quantum critical point can be identified through the measurements along the (110) direction, as studied previously, quantum and thermal critical fluctuations cannot be distinguished due to similar Curie-Weiss-like behaviors. Here we find that a sizable pressure-dependent resistivity along the (100) direction is present in all doping levels, which is against the simple picture of an Ising-type nematic model. The signal along the (100) direction becomes maximum at optimal doping, suggesting that it is associated with nematic quantum critical fluctuations. Our results indicate that thermal fluctuations from striped antiferromagnetic order dominate the underdoped regime along the (110) direction. We argue that either there is a strong coupling between the quantum critical fluctuations and the fermions, or more exotically, a higher symmetry may be present around optimal doping.en_US
dc.identifier.citationLiu, Zhaoyu, Gu, Yanhong, Zhang, Wei, et al.. "Nematic Quantum Critical Fluctuations in BaFe2−xNixAs2." <i>Physical Review Letters,</i> 117, no. 15 (2016) American Physical Society: http://dx.doi.org/10.1103/PhysRevLett.117.157002.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevLett.117.157002en_US
dc.identifier.urihttps://hdl.handle.net/1911/93794en_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.titleNematic Quantum Critical Fluctuations in BaFe2−xNixAs2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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