Band structure of-stacked graphene trilayers
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- 9 July 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 82 (3)
- https://doi.org/10.1103/physrevb.82.035409
Abstract
The -stacked -layer-graphene family of two-dimensional electron systems is described at low energies by two remarkably flat bands with Bloch states that have strongly momentum-dependent phase differences between carbon -orbital amplitudes on different layers and large associated momentum-space Berry phases. These properties are most easily understood using a simplified model with only nearest-neighbor interlayer hopping which leads to gapless semiconductor electronic structure and dispersion in both conduction and valence bands. We report on a study of the electronic band structures of trilayers which uses ab initio density-functional theory and theory to fit the parameters of a -band tight-binding model. We find that when remote interlayer hopping is retained, the triple Dirac point of the simplified model is split into three single Dirac points located along the three KM directions. External potential differences between top and bottom layers are strongly screened by charge transfer within the trilayer but still open an energy gap at overall neutrality. DOI: http://dx.doi.org/10.1103/PhysRevB.82.035409 © 2010 The American Physical Society
Keywords
This publication has 49 references indexed in Scilit:
- The electronic properties of grapheneReviews of Modern Physics, 2009
- Graphene: Exploring carbon flatlandPhysics Today, 2007
- Chirality and Correlations in GraphenePhysical Review Letters, 2007
- The rise of grapheneNature Materials, 2007
- Landau-Level Degeneracy and Quantum Hall Effect in a Graphite BilayerPhysical Review Letters, 2006
- Unconventional quantum Hall effect and Berry’s phase of 2π in bilayer grapheneNature Physics, 2006
- Two-dimensional gas of massless Dirac fermions in grapheneNature, 2005
- Experimental observation of the quantum Hall effect and Berry's phase in grapheneNature, 2005
- Theory of Electronic States and Transport in Carbon NanotubesJournal of the Physics Society Japan, 2005
- Electric Field Effect in Atomically Thin Carbon FilmsScience, 2004