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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

» presentations   » 2006.03.04-11

Contact dependence of carrier injection in carbon nanotubes: An ab initio study

N. Nemec, D. Tomanek, and G. Cuniberti

International Winterschool on Electronic Properties of Novel Materials 2006

2006.03.04-11; Kirchberg, Austria

We combine ab initio density functional theory with transport calculations to provide a microscopic basis for distinguishing between `good' and `poor' metal contacts to nanotubes. Comparing Ti and Pd as examples of different contact metals, we trace back the observed superiority of Pd to the nature of the metal-nanotube hybridization. Based on large scale Landauer transport calculations, we suggest that the `optimum' metalnanotube contact combines a weak hybridization with a large contact length between the metal and the nanotube.

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