Ballistic transmission through a graphene bilayer

Abstract

We calculate the Fermi energy dependence of the (time-averaged) current and shot noise in an impurity-free carbon bilayer (length $L\ll$ width $W$), and compare with known results for a monolayer. At the Dirac point of charge neutrality, the bilayer transmits as two independent monolayers in parallel: Both current and noise are resonant at twice the monolayer value, so that their ratio (the Fano factor) has the same 1/3 value as in a monolayer -- and the same value as in a diffusive metal. The range of Fermi energies around the Dirac point within which this pseudo-diffusive result holds is smaller, however, in a bilayer than in a monolayer (by a factor $l_{\perp }/L$, with $l_{\perp }$ the interlayer coupling length).

6 pages, 7 figures, version to appear in PRB

Cited by in corpus (9)

• The electronic properties of graphene
• Electronic properties of bilayer and multilayer graphene
• Screening, Kohn anomaly, Friedel oscillation, and RKKY interaction in bilayer graphene
• Boltzmann transport and residual conductivity in bilayer graphene
• Role of the trigonal warping on the minimal conductivity of bilayer graphene
• Effective contact model for transport through weakly-doped graphene
• Scattering of charge carriers by point defects in bilayer graphene
• Pseudo-diffusive magnetotransport in graphene
• Transport regimes in surface disordered graphene sheets