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

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  • 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, University of Iowa
  • ,
  • Jeppe Lauritsen
  • Silvano Lizzit, Elettra Sincrotrone Trieste SCpA, Elettra Sincrotrone Trieste, Area Sci Pk
  • ,
  • Nicola Lanata, Nordita, Royal Institute of Technology and Stockholm University
  • ,
  • 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
Number of pages9
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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