Giant magneto-conductance in twisted carbon nanotubes
Department of Physics, Lancaster University -
Lancaster, LA1 4YB, UK
2 Department of Physics and Astronomy and Center for Fundamental Materials Research Michigan State University - East Lansing, MI 48824-1116, USA
Accepted: 4 April 2002
Using the Landauer-Büttiker formalism, we calculate the effect of structural twist on electron transport in conducting carbon nanotubes. We demonstrate that even a localized region of twist scatters the propagating π electrons and induces the opening of a (pseudo-) gap near the Fermi level. The subsequent conductance reduction may be compensated by an applied axial magnetic field, leading to a twist-induced, giant positive magneto-conductance in clean armchair nanotubes.
PACS: 61.48.+c – Fullerenes and fullerene-related materials / 72.80.Rj – Electronic transport: fullerenes and related materials / 73.61.Wp – Electronic structure: fullerenes and related materials
© EDP Sciences, 2002