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Revealing the single electron pocket of FeSe in a single orthorhombic domain

DOI: 10.1103/PhysRevB.101.235128 DOI Help

Authors: Luke C. Rhodes (University of St. Andrews) , Matthew Watson (Diamond Light Source) , Amir A. Haghighirad (Karlsruhe Institite of Technology) , Daniil V. Evtushinsky (École Polytechnique Fédérale de Lausanne) , Timur K. Kim (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 101 , PAGES 235128

State: Published (Approved)
Published: June 2020
Diamond Proposal Number(s): 23890

Open Access Open Access

Abstract: 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.

Journal Keywords: Electronic structure; Fermi surface; Superconductivity; Nematic order; Domains

Subject Areas: Physics, Materials


Instruments: I05-ARPES

Documents:
PhysRevB.101.235128.pdf