Dirac cones and minigaps for graphene on Ir(111).

  title={Dirac cones and minigaps for graphene on Ir(111).},
  author={Ivo Pletikosi{\'c} and Marko Kralj and Petar Pervan and Radovan Brako and Johann Coraux and Alpha T. N’Diaye and Carsten Busse and Thomas Michely},
  journal={Physical review letters},
  volume={102 5},
Epitaxial graphene on Ir(111) prepared in excellent structural quality is investigated by angle-resolved photoelectron spectroscopy. It clearly displays a Dirac cone with the Dirac point shifted only slightly above the Fermi level. The moiré resulting from the overlaid graphene and Ir(111) surface lattices imposes a superperiodic potential giving rise to Dirac cone replicas and the opening of minigaps in the band structure. 

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Although the shape of the primary Dirac cone is fitted perfectly by the tight-binding calculations discussed later in the text

    See EPAPS Document No. [number will be inserted by publisher] for a thorough analysis of the spectrum in Fig. 2(b). For more information on EPAPS