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Superconductivity in the crystallogenide LaFeSiO1−δ with squeezed FeSi layers

hal.structure.identifierMatériaux, Rayonnements, Structure [NEEL - MRS]
dc.contributor.authorHANSEN, Mad
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVANEY, Jean-Baptiste
hal.structure.identifierMatériaux, Rayonnements, Structure [NEEL - MRS]
dc.contributor.authorLEPOITTEVIN, Christophe
hal.structure.identifierUniversità degli Studi di Cagliari = University of Cagliari [UniCa]
dc.contributor.authorBERNARDINI, F.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDIN, Etienne
hal.structure.identifierCRG & Grands instruments [NEEL - CRG]
hal.structure.identifierInstitut Laue-Langevin [ILL]
dc.contributor.authorNASSIF, V.
hal.structure.identifierMagnétisme et Supraconductivité [NEEL - MagSup]
dc.contributor.authorMÉASSON, M.-A.
hal.structure.identifierMagnétisme et Supraconductivité [NEEL - MagSup]
dc.contributor.authorSULPICE, A.
hal.structure.identifierLaboratoire national des champs magnétiques intenses - Grenoble [LNCMI-G ]
dc.contributor.authorMAYAFFRE, H.
hal.structure.identifierLaboratoire national des champs magnétiques intenses - Grenoble [LNCMI-G ]
dc.contributor.authorJULIEN, M.-H.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTENCÉ, Sophie
hal.structure.identifierThéorie de la Matière Condensée [NEEL - TMC]
dc.contributor.authorCANO, Andrés
hal.structure.identifierMatériaux, Rayonnements, Structure [NEEL - MRS]
dc.contributor.authorTOULEMONDE, Pierre
dc.date.issued2022
dc.identifier.issn2397-4648
dc.description.abstractEnPnictogens and chalcogens are both viable anions for promoting Fe-based superconductivity, and intense research activity in the related families has established a systematic correlation between the Fe-anion height and the superconducting critical temperature T c , with an optimum Fe-anion height of ~1.38 Å. Here, we report the discovery of superconductivity in the compound LaFeSiO 1− δ that incorporates a crystallogen element, Si, and challenges the above picture: considering the strongly squeezed Fe–Si height of 0.94 Å, the superconducting transition at T c = 10 K is unusually high. In the normal state, the resistivity displays non-Fermi-liquid behavior while NMR experiments evidence weak antiferromagnetic fluctuations. According to first-principles calculations, the Fermi surface of this material is dominated by hole pockets without nesting properties, which explains the strongly suppressed tendency toward magnetic order and suggests that the emergence of superconductivity materializes in a distinct set-up, as compared to the standard s ± - and d -wave electron-pocket-based situations. These properties and its simple-to-implement synthesis make LaFeSiO 1− δ a particularly promising platform to study the interplay between structure, electron correlations, and superconductivity.
dc.description.sponsorshipNovel As/Se-free Iron-based Superconductors - ANR-18-CE30-0018
dc.description.sponsorshipLaboratory of Alliances on Nanosciences - Energy for the Future
dc.language.isoen
dc.publisherNature publishing
dc.title.enSuperconductivity in the crystallogenide LaFeSiO1−δ with squeezed FeSi layers
dc.typeArticle de revue
dc.identifier.doi10.1038/s41535-022-00493-z
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Supraconductivité [cond-mat.supr-con]
bordeaux.journalNpj Quantum Materials
bordeaux.page86
bordeaux.volume7
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-03772788
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03772788v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Npj%20Quantum%20Materials&rft.date=2022&rft.volume=7&rft.issue=1&rft.spage=86&rft.epage=86&rft.eissn=2397-4648&rft.issn=2397-4648&rft.au=HANSEN,%20Mad&VANEY,%20Jean-Baptiste&LEPOITTEVIN,%20Christophe&BERNARDINI,%20F.&GAUDIN,%20Etienne&rft.genre=article


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