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

References in corpus (6)

• Chiral tunneling and the Klein paradox in graphene
• Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
• Asymmetry gap in the electronic band structure of bilayer graphene
• Quantum-limited shot noise in graphene
• Transport in Bilayer Graphene: Calculations within a self-consistent Born approximation
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Cited by in corpus (30)

• The electronic properties of graphene
• The electronic properties of bilayer 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
• Transmission through a biased graphene bilayer barrier
• Shot Noise in Graphene
• Role of the trigonal warping on the minimal conductivity of bilayer graphene
• Electronic transport through bilayer graphene flakes
• Effective contact model for transport through weakly-doped graphene
• Bilayer graphene with single and multiple electrostatic barriers: band structure and transmission
• Transmission through a boundary between monolayer and bilayer graphene
• Scattering of charge carriers by point defects in bilayer graphene
• Pseudo-diffusive magnetotransport in graphene
• Finite Conductivity Minimum in Bilayer Graphene without Charge Inhomogeneities
• Evanescent wave transport and shot noise in graphene: ballistic regime and effect of disorder
• Transport regimes in surface disordered graphene sheets
• Andreev reflection in bilayer graphene
• Gate-controlled conductance through bilayer graphene ribbons
• Tunable Supercurrent at the Charge Neutrality Point via Strained Graphene Junctions
• Quantum pumping in a ballistic graphene bilayer
• Electron delocalization in bilayer graphene induced by an electric field
• Interaction dominated transport and Coulomb drag in bilayer graphene
• Anisotropic minimal conductivity of graphene bilayers
• Quantum transport across van der Waals domain walls in bilayer graphene
• Minimal conductivity and signatures of quantum criticality in ballistic graphene bilayer
• Magnetoconductance of the Corbino disk in graphene: Chiral tunneling and quantum interference in the bilayer case
• Anderson Transition in Disordered Bilayer Graphene
• Effects of the contacts on shot noise in graphene nano-ribbons
• Multiphoton cross sections of conductive electrons stimulated bremsstrahlung in doped bilayer graphene