Revealing the single electron pocket of FeSe in a single orthorhombic domain
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We measure the electronic structure of FeSe from within individual orthorhombic domains. Enabled by an angle-resolved photoemission spectroscopy beamline with a highly focused beam spot (nano-ARPES), we identify clear stripelike orthorhombic domains in FeSe with a length scale of approximately 1-5 μm. Our photoemission measurements of the Fermi surface and band structure within individual domains reveal a single electron pocket at the Brillouin zone corner. This result provides clear evidence for a one-electron-pocket electronic structure of FeSe, observed without the application of uniaxial strain, and calls for further theoretical insight into this unusual Fermi surface topology. Our results also showcase the potential of nano-ARPES for the study of correlated materials with local domain structures.
Rhodes , L C , Watson , M D , Haghighirad , A A , Evtushinsky , D V & Kim , T K 2020 , ' Revealing the single electron pocket of FeSe in a single orthorhombic domain ' , Physical Review B , vol. 101 , no. 23 , 235128 . https://doi.org/10.1103/PhysRevB.101.235128
Physical Review B
Copyright © 2020 The Author(s). Open Access article. Published 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.
DescriptionAuthors acknowledge Diamond Light Source for time on beamline I05-ARPES under Proposal SI23890. L.C.R. acknowledges funding from the Royal Commission for the Exhibition of 1851.
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