Dispersion of edge states and quantum confinement of electrons in graphene channels drawn on graphene fluoride

Ning Shen, Jorge O. Sofo

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Graphene is an excellent conductor, while graphene fluoride is a wide band-gap semiconductor. We propose the formation of graphene channels embedded in graphene fluoride as a method to induce quantum confinement of charge carriers in graphene. In particular, we study the electronic structure of graphene channels drawn on the fluoride along two high-symmetry directions: the armchair and zigzag orientations. The zigzag channels are found to have dispersive one-dimensional edge bands, contrary to the case of ribbons and channels drawn on graphane, where the edge state is flat close to the Fermi level and has a very large effective mass. The effective mass of this one-dimensional edge state can be controlled by electrostatic interactions at the edge of the channel. This result indicates that the mobility of these channels can be controlled by a localized gate voltage. The armchair channel is found to be metallic or semiconducting depending on the width of the channel, in agreement with ribbons and hydrogen-limited channels.

Original languageEnglish (US)
Article number245424
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number24
DOIs
StatePublished - Jun 24 2011

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Dispersion of edge states and quantum confinement of electrons in graphene channels drawn on graphene fluoride'. Together they form a unique fingerprint.

Cite this