Low Energy Coherent Transport in Metallic Carbon Nanotube Junctions

Abstract

We study the low-energy electronic properties of a junction made of two crossed metallic carbon nanotubes of general chiralities. We derive a tight binding tunneling matrix element that couples low-energy states on the two tubes, which allows us to calculate the contact conductance of the junction. We find that the intrinsic asymmetries of the junction cause the forward and backward hopping probabilities from one tube to another to be different. This defines a zero-field Hall conductance for the junction, which we find to scale inversely with the junction contact conductance. Through a systematic study of the dependence of the junction conductance on different junction parameters, we find that the crossing angle is the dominant factor which determines the magnitude of the conductance.

8 pages, 9 figures

References in corpus (6)

• A tight-binding approach to uniaxial strain in graphene
• Electronic states and quantum transport in double-wall carbon nanotubes
• Spectral Correlation in Incommensurate Multi-Walled Carbon Nanotubes
• Role of contact bonding on electronic transport in metal-carbon nanotube-metal systems
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Cited by in corpus (4)

• Perturbation calculations on interlayer transmission rates from symmetric to antisymmetric channels in parallel armchair nanotube junctions
• Evidence for Phonon-Assisted Intertube Electronic Transport in an Armchair Carbon Nanotube Film
• Relation between dispersion lines and conductance of telescoped armchair double-wall nanotubes analyzed using perturbation formulas and first-principles calculations
• A Graphene-Carbon Nanotube Hybrid Material for Photovoltaic Applications