Proximity and anomalous field-effect characteristics in double-wall carbon nanotubes

Details Proximity and anomalous field-effect characteristics in double-wall carbon nanotubes Proximity and anomalous field-effect characteristics in double-wall carbon nanotubes

2006-03-22

arxiv.org/abs/cond-mat/0603577v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1063/1.2435927

Proximity effect on field-effect characteristic (FEC) in double-wall carbon nanotubes (DWCNTs) is investigated. In a semiconductor-metal (S-M) DWCNT, the penetration of electron wavefunctions in the metallic shell to the semiconducting shell turns the original semiconducting tube into a metal with a non-zero local density of states at the Fermi level. By using a two-band tight-binding model on a ladder of two legs, it is demonstrated that anomalous FEC observed in so-called S-M type DWCNTs can be fully understood by the proximity effect of metallic phases.

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