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Open Quantum Systems Decoherence
Quantum Simulation
Dirac cones for bi- and trilayer Bernal-stacked graphene in a quantum graph model
arXiv
Authors: Cesar R. de Oliveira, Vinicius L. Rocha
Year
2020
Paper ID
19226
Status
Preprint
Abstract Read
~2 min
Abstract Words
77
Citations
N/A
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 π-orbital continuum model with nearest-neighbour tunneling that have been discussed in the physics literature.
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- 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...
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