Modeling extended contacts to nanotube and graphene devices

Details Modeling extended contacts to nanotube and graphene devices Modeling extended contacts to nanotube and graphene devices

2007-11-07

arxiv.org/abs/0711.1088v2

Phys. Rev. B 77, 125420 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 13 figures

Scientific paper

10.1103/PhysRevB.77.125420

Carrier injection into carbon nanotubes and graphene nanoribbons, contacted by a metal coating over an arbitrary length, is studied by various means: Minimal models allow for exact analytic solutions which can be transferred to the original system with high precision. Microscopic ab initio calculations of the electronic structure at the carbon-metal interface allow us to extract -- for Ti and Pd as contacting materials -- realistic parameters, which are then used in large scale tight-binding models for transport calculations. The results are shown to be robust against nonepitaxially grown electrodes and general disorder at the interface, as well as various refinements of the model.

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