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Electronic properties of single-layer CoO2/Au(111)

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DOI

  • Ann Julie U. Holt
  • ,
  • Sahar Pakdel
  • ,
  • Jonathan Rodriguez-Fernandez, University of Oviedo
  • ,
  • Yu Xiang Zhang, STFC Rutherford Appleton Laboratory
  • ,
  • Davide Curcio
  • ,
  • Zhaozong Sun
  • Paolo Lacovig, Elettra Sincrotrone Trieste SCpA, Elettra Sincrotrone Trieste, Area Sci Pk
  • ,
  • Yong-Xin Yao, Iowa State Univ, Iowa State University, Dept Phys & Astron
  • ,
  • Jeppe Lauritsen
  • Silvano Lizzit, Elettra Sincrotrone Trieste SCpA, Elettra Sincrotrone Trieste, Area Sci Pk
  • ,
  • Nicola Lanata
  • Philip Hofmann
  • Marco Bianchi
  • Charlotte E. Sanders, STFC Rutherford Appleton Laboratory

We report direct measurements via angle-resolved photoemission spectroscopy (ARPES) of the electronic dispersion of single-layer (SL) CoO2. The Fermi contour consists of a large hole pocket centered at the (Gamma) over bar point. To interpret the ARPES results, we use density functional theory (DFT) in combination with the multi-orbital Gutzwiller Approximation (DFT+GA), basing our calculations on crystalline structure parameters derived from x-ray photoelectron diffraction and low-energy electron diffraction. Our calculations are in good agreement with the measured dispersion. We conclude that the material is a moderately correlated metal. We also discuss substrate effects, and the influence of hydroxylation on the CoO2 SL electronic structure.

Original languageEnglish
Article number035050
Journal2D materials
Volume8
Issue3
Number of pages9
ISSN2053-1583
DOIs
Publication statusPublished - Jul 2021

    Research areas

  • cobalt oxide, two-dimensional materials, angle-resolved photoemission spectroscopy, x-ray photoelectron diffraction, x-ray photoelectron spectroscopy, density functional theory, X-RAY PHOTOEMISSION, COBALT OXYHYDROXIDE, PHASE-DIAGRAM, AU(111), SPECTRA, SUPERCONDUCTIVITY, COO2, CONDUCTIVITY, PT(111), OXIDES

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