Phase diagram and neutron spin resonance of superconducting NaFe1−xCuxAs

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dc.citation.issueNumber5en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber95en_US
dc.contributor.authorTan, Guotaien_US
dc.contributor.authorSong, Yuen_US
dc.contributor.authorZhang, Ruien_US
dc.contributor.authorLin, Lifangen_US
dc.contributor.authorXu, Zhuangen_US
dc.contributor.authorTian, Longen_US
dc.contributor.authorChi, Songxueen_US
dc.contributor.authorGraves-Brook, M.K.en_US
dc.contributor.authorLi, Shiliangen_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2017-05-05T19:00:53Z
dc.date.available2017-05-05T19:00:53Z
dc.date.issued2017en_US
dc.description.abstractWe use transport and neutron scattering to study the electronic phase diagram and spin excitations of NaFe1−xCuxAs single crystals. Similar to Co- and Ni-doped NaFeAs, a bulk superconducting phase appears near x≈2% with the suppression of stripe-type magnetic order in NaFeAs. Upon further increasing Cu concentration the system becomes insulating, culminating in an antiferromagnetically ordered insulating phase near x≈50%. Using transport measurements, we demonstrate that the resistivity in NaFe1−xCuxAs exhibits non-Fermi-liquid behavior near x≈1.8%. Our inelastic neutron scattering experiments reveal a single neutron spin resonance mode exhibiting weak dispersion along c axis in NaFe0.98Cu0.02As. The resonance is high in energy relative to the superconducting transition temperature Tc but weak in intensity, likely resulting from impurity effects. These results are similar to other iron pnictides superconductors despite that the superconducting phase in NaFe1−xCuxAs is continuously connected to an antiferromagnetically ordered insulating phase near x≈50% with significant electronic correlations. Therefore, electron correlations is an important ingredient of superconductivity in NaFe1−xCuxAs and other iron pnictides.en_US
dc.identifier.citationTan, Guotai, Song, Yu, Zhang, Rui, et al.. "Phase diagram and neutron spin resonance of superconducting NaFe1−xCuxAs." <i>Physical Review B,</i> 95, no. 5 (2017) American Physical Society: https://doi.org/10.1103/PhysRevB.95.054501.
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.95.054501en_US
dc.identifier.urihttps://hdl.handle.net/1911/94190
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.titlePhase diagram and neutron spin resonance of superconducting NaFe1−xCuxAsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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