Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in SrCo2As2

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dc.citation.articleNumber117204en_US
dc.citation.issueNumber11en_US
dc.citation.journalTitlePhysical Review Lettersen_US
dc.citation.volumeNumber122en_US
dc.contributor.authorLi, Yuen_US
dc.contributor.authorYin, Zhipingen_US
dc.contributor.authorLiu, Zhonghaoen_US
dc.contributor.authorWang, Weiyien_US
dc.contributor.authorXu, Zhuangen_US
dc.contributor.authorSong, Yuen_US
dc.contributor.authorTian, Longen_US
dc.contributor.authorHuang, Yaoboen_US
dc.contributor.authorShen, Daweien_US
dc.contributor.authorAbernathy, D.L.en_US
dc.contributor.authorNiedziela, J.L.en_US
dc.contributor.authorEwings, R.A.en_US
dc.contributor.authorPerring, T.G.en_US
dc.contributor.authorPajerowski, Daniel M.en_US
dc.contributor.authorMatsuda, Masaakien_US
dc.contributor.authorBourges, Philippeen_US
dc.contributor.authorMechthild, Enderleen_US
dc.contributor.authorSu, Yixien_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2019-08-13T15:19:42Zen_US
dc.date.available2019-08-13T15:19:42Zen_US
dc.date.issued2019en_US
dc.description.abstractWe use inelastic neutron scattering to study energy and wave vector dependence of spin fluctuations in SrCo2As2, derived from SrFe2−xCoxAs2 iron pnictide superconductors. Our data reveal the coexistence of antiferromagnetic (AF) and ferromagnetic (FM) spin fluctuations at wave vectors QAF=(1,0) and QFM=(0,0)/(2,0), respectively. By comparing neutron scattering results with those of dynamic mean field theory calculation and angle-resolved photoemission spectroscopy experiments, we conclude that both AF and FM spin fluctuations in SrCo2As2 are closely associated with a flatband of the eg orbitals near the Fermi level, different from the t2g orbitals in superconducting SrFe2−xCoxAs2. Therefore, Co substitution in SrFe2−xCoxAs2 induces a t2g to eg orbital switching, and is responsible for FM spin fluctuations detrimental to the singlet pairing superconductivity.en_US
dc.identifier.citationLi, Yu, Yin, Zhiping, Liu, Zhonghao, et al.. "Coexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in SrCo2As2." <i>Physical Review Letters,</i> 122, no. 11 (2019) American Physical Society: https://doi.org/10.1103/PhysRevLett.122.117204.en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevLett.122.117204en_US
dc.identifier.urihttps://hdl.handle.net/1911/106234en_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.titleCoexistence of Ferromagnetic and Stripe Antiferromagnetic Spin Fluctuations in SrCo2As2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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