Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies

Simple item page
dc.citation.articleNumber94514en_US
dc.citation.issueNumber9en_US
dc.citation.journalTitlePhysical Review Ben_US
dc.citation.volumeNumber89en_US
dc.contributor.authorGao, Peiwenen_US
dc.contributor.authorYu, Rongen_US
dc.contributor.authorSun, Lilingen_US
dc.contributor.authorWang, Hangdongen_US
dc.contributor.authorWang, Zhenen_US
dc.contributor.authorWu, Qien_US
dc.contributor.authorFang, Minghuen_US
dc.contributor.authorChen, Genfuen_US
dc.contributor.authorGuo, Jingen_US
dc.contributor.authorZhang, Chaoen_US
dc.contributor.authorGu, Dachunen_US
dc.contributor.authorTian, Huanfangen_US
dc.contributor.authorLi, Jianqien_US
dc.contributor.authorLiu, Jingen_US
dc.contributor.authorLi, Yanchunen_US
dc.contributor.authorLi, Xiaodongen_US
dc.contributor.authorJiang, Shengen_US
dc.contributor.authorYang, Keen_US
dc.contributor.authorLi, Aiguoen_US
dc.contributor.authorSi, Qimiaoen_US
dc.contributor.authorZhao, Zhongxianen_US
dc.date.accessioned2017-06-06T19:07:23Zen_US
dc.date.available2017-06-06T19:07:23Zen_US
dc.date.issued2014en_US
dc.description.abstractThere is considerable interest in uncovering the physics of iron-based superconductivity from the alkaline iron selenides, a materials class containing an insulating phase (245 phase) and a superconducting (SC) phase. Due to the microstructural complexity of these superconductors, the role of the 245 phase in the development of the superconductivity has been a puzzle. Here we demonstrate a comprehensive high-pressure study on the insulating samples with pure 245 phase and biphasic SC samples. We find that the insulating behavior can be completely suppressed by pressure in the insulating samples and also identify an intermediate metallic (M′) state. The Mott insulating (MI) state of the 245 phase and the M′ state coexist over a significant range of pressure up to ∼10 GPa, the same pressure at which the superconductivity of the SC samples vanishes. Our results reveal the M′ state as a pathway that connects the insulating and SC phases of the alkaline iron selenides and indicate that the coexistence and interplay between the MI and M′ states is a necessary condition for superconductivity. Finally, we interpret the M′ state in terms of an orbital selectivity of the correlated 3d electrons.en_US
dc.identifier.citationGao, Peiwen, Yu, Rong, Sun, Liling, et al.. "Role of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studies." <i>Physical Review B,</i> 89, no. 9 (2014) American Physical Society: https://doi.org/10.1103/PhysRevB.89.094514.en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.89.094514en_US
dc.identifier.urihttps://hdl.handle.net/1911/94815en_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.titleRole of the 245 phase in alkaline iron selenide superconductors revealed by high-pressure studiesen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Role-of-the-245-phase.pdf
Size:
2.12 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Physics and Astronomy Publications