Journal
PHYSICAL REVIEW B
Volume 79, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.155402
Keywords
band structure; carrier mobility; dispersion relations; electrical conductivity; electronic density of states; graphene; superlattices
Funding
- IMEC
- Flemish Science Foundation (FWO-Vl)
- Belgian Science Policy (IAP)
- Brazilian Council for Research (CNPq)
- Canadian NSERC [OGP0121756]
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We evaluate the electronic transmission and conductance in bilayer graphene through a finite number of potential barriers. Further, we evaluate the dispersion relation in a bilayer graphene superlattice with a periodic potential applied to both layers. As a model we use the tight-binding Hamiltonian in the continuum approximation. For zero bias the dispersion relation shows a finite gap for carriers with zero momentum in the direction parallel to the barriers. This is in contrast to single-layer graphene where no such gap was found. A gap also appears for a finite bias. Numerical results for the energy spectrum, conductance, and the density of states are presented and contrasted with those pertaining to single-layer graphene.
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