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Träfflista för sökning "L773:1873 5584 ;pers:(Schulte Karina)"

Sökning: L773:1873 5584 > Schulte Karina

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1.
  • Makela, J., et al. (författare)
  • Line shape and composition of the In 3d(5/2) core-level photoemission for the interface analysis of In-containing III-V semiconductors
  • 2015
  • Ingår i: Applied Surface Science. - : Elsevier BV. - 1873-5584 .- 0169-4332. ; 329, s. 371-375
  • Tidskriftsartikel (refereegranskat)abstract
    • The In 3d(5/2) photoelectron spectroscopy peak has been widely used to determine the interface structures of In-containing III-V device materials (e.g., oxidation states). However, an unclear parameter affecting the determination of the energy shifts and number of the core-level components, and therefore, the interpreted interface structure and composition, is still the intrinsic In 3d(5/2) peak line shape. It is undecided whether the line shape is naturally symmetric or asymmetric for pure In-containing III-V compounds. By using high-resolution photoelectron spectroscopy, we show that the In 3d(5/2) asymmetry arising from the emission at high binding-energy tail is not an intrinsic property of InAs, InP, InSb and InGaAs. Furthermore, it is shown that asymmetry of In 3d(5/2) peaks of pure III-V's originates from the natural surface reconstructions which cause the coexistence of slightly shifted In 3d(5/2) components with the symmetric peak shape and dominant Lorentzian broadening. (C) 2015 Elsevier B.V. All rights reserved.
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2.
  • Schulte, Karina, et al. (författare)
  • Bandgap formation in graphene on Ir(111) through oxidation
  • 2013
  • Ingår i: Applied Surface Science. - : Elsevier BV. - 1873-5584 .- 0169-4332. ; 267, s. 74-76
  • Tidskriftsartikel (refereegranskat)abstract
    • A graphene monolayer on single crystal Ir(111) has been studied using angle-resolved photoemission spectroscopy (ARPES) before and after exposure to atomic oxygen. With increasing oxygen coverage the Dirac cone, centered on the K-point of the Brillouin zone, broadens and finally transforms to a parabolic rather than linear feature, introducing a pronounced energy bandgap at the Fermi level. The opening of a bandgap of at least 0.35 eV was observed at the oxygen exposure close to the saturation coverage. (C) 2012 Elsevier B. V. All rights reserved.
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