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

@article{Pletikosi2009DiracCA,
  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},
  year={2009},
  volume={102 5},
  pages={
          056808
        }
}
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. 

Figures from this paper

Large band gap opening between graphene Dirac cones induced by Na adsorption onto an Ir superlattice.

TLDR
It is found that Na is adsorbed on top of the graphene layer, and when coadsorbed onto an Ir cluster superlattice, it results in the opening of a large band gap of Δ(Na/Ir/G) = 740 meV, comparable to the one of Ge and with preserved high group velocity of the charge carriers.

Absence of Edge States in Covalently Bonded Zigzag Edges of Graphene on Ir(111)

The zigzag edges of graphene on Ir(111) are studied by ab initio simulations and low-temperature scanning tunneling spectroscopy, providing information about their structural, electronic, and

Epitaxial graphene on metals

In this chapter, we review the recent results on graphene films epitaxially grown on 3d − 5d transition-metal surfaces focussing mainly on their atomic structure, aspects of chemical interaction both

Structure of graphene on the Ni(110) surface

The structure of graphene on Ni(110) was studied using scanning tunneling microscopy (STM) and low-energy electron diffraction spectroscopy. STM images show a Moire structure, depending on the

Fermi surface map of large-scale single-orientation graphene on SiO2

Large scale tetraoctylammonium-assisted electrochemical transfer of graphene grown on single-crystalline Ir(1 1 1) films by chemical vapour deposition is reported. The transferred samples are

Epitaxial graphene on metal surfaces

  • C. Busse
  • Physics, Materials Science
    2009 9th IEEE Conference on Nanotechnology (IEEE-NANO)
  • 2009
Epitaxial graphene can be grown by catalytic decomposition of hydrocarbons on Ir(111). Scanning tunneling microscopy reveals that C/Ir(111) has a high degree of structural quality (μm-sized domains,

sp2-like hybridization of silicon valence orbitals in silicene nanoribbons

Silicene nanoribbons grown on a silver (110) substrate have been studied by reflection electron energy loss spectroscopy as a function of the electron beam incidence angle α. The spectra, taken at

Sheet plasmons in modulated graphene on Ir(111)

The sheet plasmon of graphene on Ir(111) was investigated in this paper by means of high-resolution electron energy loss spectroscopy. The perfect lateral coordination of sp2-hybridized C atoms on a
...

References

SHOWING 1-4 OF 4 REFERENCES

Nature Mater

  • 7, 406
  • 2008

Condens

  • Matter 9, 1
  • 1997

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