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| VOLUME 89 | ISSUE 4 |
PAGE 236
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| Dependence of transport through carbon nanotubes on local Coulomb potential |
A. A. Zhukov, G. Finkelstein+
Institute of Solid State Physics RAS, 142432 Chernogolovka, Russia
+Department of Physics, Duke University, Durham, North Carolina 27708, USA
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PACS: 71.20.Tx, 73.23.Hk, 73.63.Fg
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Abstract
In this paper, we present the results of helium temperature
transport measurements through carbon nanotubes using an AFM
conductive tip as a mobile gate for creation of a local distributive Coulomb potential. In semiconducting nanotubes we
observe shifting of the conductance peaks with changing of the AFM
tip position. This result can be explained with a particle in the
box quantum model. In high quality metallic nanotubes we observe
that the local Coulomb potential does not destroy the fourfold
degeneracy of the energy levels.
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