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VOLUME 89 | ISSUE 4 | PAGE 236
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

PACS: 71.20.Tx, 73.23.Hk, 73.63.Fg
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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