Band gaps in incommensurable graphene on hexagonal boron nitride

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Devising ways of opening a band gap in graphene to make charge-carrier masses finite is essential for many applications. Recent experiments with graphene on hexagonal boron nitride (h -BN) offer tantalizing hints that the weak interaction with the substrate is sufficient to open a gap, in contradiction of earlier findings. Using many-body perturbation theory, we find that the small observed gap is what remains after a much larger underlying quasiparticle gap is suppressed by incommensurability. The sensitivity of this suppression to a small modulation of the distance separating graphene from the substrate suggests ways of exposing the larger underlying gap
Original languageEnglish
Pages (from-to)201404/1-201404/5
Number of pages5
JournalPhysical review B: Condensed matter and materials physics
Publication statusPublished - 2014


  • IR-94867
  • METIS-303610


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