Nematic Energy Scale and the Missing Electron Pocket in FeSe

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dc.citation.articleNumber041049
dc.citation.issueNumber4
dc.citation.journalTitlePhysical Review X
dc.citation.volumeNumber9
dc.contributor.authorYi, M.
dc.contributor.authorPfau, H.
dc.contributor.authorZhang, Y.
dc.contributor.authorHe, Y.
dc.contributor.authorWu, H.
dc.contributor.authorChen, T.
dc.contributor.authorYe, Z.R.
dc.contributor.authorHashimoto, M.
dc.contributor.authorYu, R.
dc.contributor.authorSi, Q.
dc.contributor.authorLee, D.-H.
dc.contributor.authorDai, Pengcheng
dc.contributor.authorShen, Z.-X.
dc.contributor.authorLu, D.H.
dc.contributor.authorBirgeneau, R.J.
dc.date.accessioned2021-10-06T14:15:36Z
dc.date.available2021-10-06T14:15:36Z
dc.date.issued2019
dc.description.abstractSuperconductivity emerges in proximity to a nematic phase in most iron-based superconductors. It is therefore important to understand the impact of nematicity on the electronic structure. Orbital assignment and tracking across the nematic phase transition prove to be challenging due to the multiband nature of iron-based superconductors and twinning effects. Here, we report a detailed study of the electronic structure of fully detwinned FeSe across the nematic phase transition using angle-resolved photoemission spectroscopy. We clearly observe a nematicity-driven band reconstruction involving dxz, dyz, and dxy orbitals. The nematic energy scale between dxz and dyz bands reaches a maximum of 50 meV at the Brillouin zone corner. We are also able to track the dxz electron pocket across the nematic transition and explain its absence in the nematic state. Our comprehensive data of the electronic structure provide an accurate basis for theoretical models of the superconducting pairing in FeSe.
dc.identifier.citationYi, M., Pfau, H., Zhang, Y., et al.. "Nematic Energy Scale and the Missing Electron Pocket in FeSe." <i>Physical Review X,</i> 9, no. 4 (2019) American Physical Society: https://doi.org/10.1103/PhysRevX.9.041049.
dc.identifier.digitalPhysRevX-9-041049
dc.identifier.doihttps://doi.org/10.1103/PhysRevX.9.041049
dc.identifier.urihttps://hdl.handle.net/1911/111468
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.rightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleNematic Energy Scale and the Missing Electron Pocket in FeSe
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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