Effective contact model for transport through weakly-doped graphene

Abstract

Recent investigations address transport through ballistic charge-neutral graphene strips coupled to doped graphitic leads. This paper shows that identical transport properties arise when the leads are replaced by quantum wires. This duality between graphitic and metallic leads originates in the selection of modes with transverse momentum close to the K points, and can be extended to a wide class of contact models. Among this class we identify a simple, effective contact model, which provides an efficient tool to study the transport through extended weakly-doped graphitic systems.

8 pages, 4 figures, to appear in PRB, significantly extended with detailed appendices

References in corpus (5)

• Electric Field Effect in Atomically Thin Carbon Films
• Unconventional Integer Quantum Hall effect in graphene
• Electron transport in disordered graphene
• Ballistic transmission through a graphene bilayer
• Transport regimes in surface disordered graphene sheets

Cited by in corpus (12)

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• Andreev reflection and Klein tunneling in graphene
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• Shot Noise in Ballistic Graphene
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• Modeling extended contacts to nanotube and graphene devices
• Electronic transport in normal-conductor/graphene/normal-conductor junctions and conditions for insulating behavior at a finite charge-carrier density
• Conformal mapping and shot noise in graphene
• MagnetoResistance of graphene-based spin valves
• Calculation of the conductance of a graphene sheet using the Chalker-Coddington network model
• Shot Noise Probing of Magnetic Ordering in Zigzag Graphene Nanoribbons