Orbital-Selective Mott Phase in Multiorbital Models for Alkaline Iron Selenides K1−xFe2−ySe2

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dc.citation.firstpage146402en_US
dc.citation.issueNumber14en_US
dc.citation.journalTitlePhysical Review Lettersen_US
dc.citation.volumeNumber110en_US
dc.contributor.authorYu, Rongen_US
dc.contributor.authorSi, Qimiaoen_US
dc.date.accessioned2016-04-05T20:14:03Zen_US
dc.date.available2016-04-05T20:14:03Zen_US
dc.date.issued2013en_US
dc.description.abstractWe study a multiorbital model for the alkaline iron selenides K1−xFe2−ySe2 using a slave-spin method. With or without ordered vacancies, we identify a metal-to-Mott-insulator transition at the commensurate filling of six 3d electrons per iron ion. For Hund’s couplings beyond a threshold value, this occurs via an intermediate orbital-selective Mott phase, in which the 3d xy orbital is Mott localized while the other 3d orbitals remain itinerant. This phase is still stabilized over a range of carrier dopings. Our results lead to an overall phase diagram for the alkaline iron selenides, which provides a unified framework to understand the interplay between the strength of the vacancy order and carrier doping. In this phase diagram, the orbital-selective Mott phase provides a natural link between the superconducting K1−xFe2−ySe2 and its Mott-insulating parent compound.en_US
dc.identifier.citationYu, Rong and Si, Qimiao. "Orbital-Selective Mott Phase in Multiorbital Models for Alkaline Iron Selenides K1−xFe2−ySe2." <i>Physical Review Letters,</i> 110, no. 14 (2013) American Physical Society: 146402. http://dx.doi.org/10.1103/PhysRevLett.110.146402.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevLett.110.146402en_US
dc.identifier.urihttps://hdl.handle.net/1911/88857en_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.titleOrbital-Selective Mott Phase in Multiorbital Models for Alkaline Iron Selenides K1−xFe2−ySe2en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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