Eur. Phys. J. B 67, 565-576 (2009)
https://doi.org/10.1140/epjb/e2009-00058-x

Electronic properties of double-layer carbon nanotubes

¹ Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 043 53 Kosice, Slovak Republic
² Joint Institute for Nuclear Research, BLTP, 141980 Dubna, Moscow region, Russia

Corresponding author: ^a pincak@saske.sk

Received: 7 August 2008
Revised: 15 January 2009
Published online: 18 February 2009

Abstract

The electronic spectra for double-wall zigzag and armchair nanotubes are found. The influence of nanotube curvatures on the electronic spectra is also calculated. Our finding that the outer shell is hole doped by the inner shell is in the difference between Fermi levels of individual shells which originate from the different hybridization of π orbital. The shift and rotation of the inner nanotube with respect to the outer nanotube are investigated. We found stable semimetal characteristics of the armchair DWNTs in regard of the shift and rotation of the inner nanotube. We predict the shift of k_F towards the bigger wave vectors with decreasing of the radius of the armchair nanotube.