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arXiv · 2011.08658

Dirac cones for bi- and trilayer Bernal-stacked graphene in a quantum graph model

Cesar R. de Oliveira·Vinicius L. Rocha
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Abstract

A quantum graph model for a single sheet of graphene is extended to bilayer and trilayer Bernal-stacked graphene; the spectra are characterized and the dispersion relations explicitly obtained; Dirac cones are then proven to be present only for trilayer graphene, although the bilayer has a gapless parabolic band component. Our model rigorously exhibits basic facts from tight-binding calculations, effective two-dimensional models and a $\pi$-orbital continuum model with nearest-neighbour tunneling that have been discussed in the physics literature.

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BibTeXRIS

Cesar R. de Oliveira, Vinicius L. Rocha. 2020-11-17. Dirac cones for bi- and trilayer Bernal-stacked graphene in a quantum graph model. https://doi.org/10.1088/1751-8121%2Fabc6c1

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