Physics – Condensed Matter – Materials Science
Scientific paper
2011-11-02
Physics
Condensed Matter
Materials Science
Scientific paper
The adhesion of graphene on slightly lattice-mismatched surfaces, for instance of hexagonal boron nitride (hBN) or Ir(111), gives rise to a complex landscape of sublattice symmetry-breaking potentials for the Dirac fermions. Whereas a gap at the Dirac point opens for perfectly lattice-matched graphene on hBN, we show that the small lattice incommensurability prevents the opening of this gap and rather leads to a renormalized Dirac dispersion with a trigonal warping. This warping breaks the effective time reversal symmetry in a single valley. On top of this a new set of massless Dirac fermions is generated, which are characterized by a group velocity that is half the one of pristine graphene.
Ortix Carmine
van den Brink Jeroen
Yang Liping
No associations
LandOfFree
Graphene on incommensurate substrates: trigonal warping and emerging Dirac cone replicas with halved group velocity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Graphene on incommensurate substrates: trigonal warping and emerging Dirac cone replicas with halved group velocity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Graphene on incommensurate substrates: trigonal warping and emerging Dirac cone replicas with halved group velocity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-327586