Structure and composition of the superconducting phase in alkali iron selenide KyFe1.6+xSe2

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dc.citation.articleNumber134509en_US
dc.citation.issueNumber13en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber89en_US
dc.contributor.authorCarr, Scott V.en_US
dc.contributor.authorLouca, Despinaen_US
dc.contributor.authorSiewenie, Joanen_US
dc.contributor.authorHuang, Q.en_US
dc.contributor.authorWang, Aifengen_US
dc.contributor.authorChen, Xianhuien_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2017-06-05T20:44:19Zen_US
dc.date.available2017-06-05T20:44:19Zen_US
dc.date.issued2014en_US
dc.description.abstractWe use neutron diffraction to study the temperature evolution of the average structure and local lattice distortions in insulating and superconducting potassium iron selenide KyFe1.6+xSe2. In the high temperature paramagnetic state, both materials have a single phase with a crystal structure similar to that of the BaFe2As2 family of iron pnictides. While the insulating KyFe1.6+xSe2 forms a √5×√5 iron vacancy ordered block antiferromagnetic (AF) structure at low temperature, the superconducting compounds spontaneously phase separate into an insulating part with √5×√5iron vacancy order and a superconducting phase with chemical composition of KzFe2Se2 and BaFe2As2 structure. Therefore, superconductivity in alkaline iron selenides arises from alkali deficient KzFe2Se2 in the matrix of the insulating block AF phase.en_US
dc.identifier.citationCarr, Scott V., Louca, Despina, Siewenie, Joan, et al.. "Structure and composition of the superconducting phase in alkali iron selenide KyFe1.6+xSe2." <i>Physical Review B,</i> 89, no. 13 (2014) American Physical Society: https://doi.org/10.1103/PhysRevB.89.134509.en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.89.134509en_US
dc.identifier.urihttps://hdl.handle.net/1911/94794en_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.titleStructure and composition of the superconducting phase in alkali iron selenide KyFe1.6+xSe2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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