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arXiv · 0711.1088

Modeling extended contacts to nanotube and graphene devices

Norbert Nemec·David Tomanek·Gianaurelio Cuniberti
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Abstract

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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Norbert Nemec, David Tomanek, Gianaurelio Cuniberti. 2008-04-30. Modeling extended contacts to nanotube and graphene devices. https://doi.org/10.1103/physrevb.77.125420

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