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dc.contributor.authorWatson, Matthew D.
dc.contributor.authorDudin, Pavel
dc.contributor.authorRhodes, Luke C.
dc.contributor.authorEvtushinsky, Daniil V.
dc.contributor.authorIwasawa, Hideaki
dc.contributor.authorAswartham, Saicharan
dc.contributor.authorWurmehl, Sabine
dc.contributor.authorBüchner, Bernd
dc.contributor.authorHoesch, Moritz
dc.contributor.authorKim, Timur K.
dc.identifier.citationWatson , M D , Dudin , P , Rhodes , L C , Evtushinsky , D V , Iwasawa , H , Aswartham , S , Wurmehl , S , Büchner , B , Hoesch , M & Kim , T K 2019 , ' Probing the reconstructed Fermi surface of antiferromagnetic BaFe 2 As 2 in one domain ' , npj Quantum Materials , vol. 4 , 36 .
dc.identifier.otherPURE: 260484011
dc.identifier.otherPURE UUID: 6022a9a8-5f11-4bca-88b2-4c11bbb3046e
dc.identifier.otherScopus: 85069458858
dc.identifier.otherORCID: /0000-0003-2468-4059/work/60427705
dc.identifier.otherORCID: /0000-0002-0737-2814/work/60427725
dc.descriptionThe work at IFW was supported by the Deutsche Forschungsgemeinschaft (DFG) through the Priority Programme SPP1458. L.C.R. is supported by an iCASE studentship of the UK Engineering and Physical Sciences Research Council (EPSRC) and Diamond Light Source Ltd CASE award. S.A. thanks the DFG for funding (AS 523/4-1 & 523/3-1).en
dc.description.abstractA fundamental part of the puzzle of unconventional superconductivity in the Fe-based superconductors is the understanding of the magnetic and nematic instabilities of the parent compounds. The issues of which of these can be considered the leading instability, and whether weak- or strong-coupling approaches are applicable, are both critical and contentious. Here, we revisit the electronic structure of BaFe2As2 using angle-resolved photoemission spectroscopy (ARPES). Our high-resolution measurements of samples “detwinned” by the application of a mechanical strain reveal a highly anisotropic 3D Fermi surface in the low-temperature antiferromagnetic phase. By comparison of the observed dispersions with ab initio calculations, we argue that overall it is magnetism, rather than orbital/nematic ordering, which is the dominant effect, reconstructing the electronic structure across the Fe 3d bandwidth. Finally, using a state-of-the-art nano-ARPES system, we reveal how the observed electronic dispersions vary in real space as the beam spot crosses domain boundaries in an unstrained sample, enabling the measurement of ARPES data from within single antiferromagnetic domains, and showing consistence with the effective mono-domain samples obtained by detwinning.
dc.relation.ispartofnpj Quantum Materialsen
dc.rightsCopyright © The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.subjectQC Physicsen
dc.subjectElectronic, Optical and Magnetic Materialsen
dc.subjectCondensed Matter Physicsen
dc.titleProbing the reconstructed Fermi surface of antiferromagnetic BaFe2As2 in one domainen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.Centre for Designer Quantum Materialsen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.description.statusPeer revieweden

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