Electron transport in semiconducting carbon nanotubes with hetero-metallic contacts

Details Electron transport in semiconducting carbon nanotubes with hetero-metallic contacts Electron transport in semiconducting carbon nanotubes with hetero-metallic contacts

2005-01-21

arxiv.org/abs/cond-mat/0501538v1

Nanotechnology 16, 5 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Higher quality figures available at http://www.albany.edu/~yx152122

Scientific paper

10.1088/0957-4484/16/1/002

We present an atomistic self-consistent study of the electronic and transport properties of semiconducting carbon nanotube in contact with metal electrodes of different work functions, which shows simultaneous electron and hole doping inside the nanotube junction through contact-induced charge transfer. We find that the band lineup in the nanotube bulk region is determined by the effective work function difference between the nanotube channel and source/drain electrodes, while electron transmission through the SWNT junction is affected by the local band structure modulation at the two metal-nanotube interfaces, leading to an effective decoupling of interface and bulk effects in electron transport through nanotube junction devices.

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