Effects of Localized Electrostatic Fields on Electron Transport in Armchair Single-Walled Carbon Nanotubes
Abstract
Transverse electrostatic fields with high multipole components can be used to open a band gap in metallic single-wall carbon nanotube (SWNTs). We address finite-size SWNTs to show what could be an experimental manifestation of this effect. We perform an explicit calculation of a real space Green's function for the SWNT within the first-neighbor tight binding formalism, and employ our result to obtain electronic transmittance T as a function of energy, according to T(E)=tr[Γ _1(E)G(E) Γ _2(E) G^ (E)], where we calculate self-energies due to contacts Γ _i(E); i=1,2 to study the effect of local electrostatic fields upon transmittance. We propose several device configurations to obtain the gap opening in armchair nanotubes that might be experimentally attainable.
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MARY16008R