We have investigated the half-metallicity in hydrogenated carbon nanotubes under an electric field as a function of the electric field direction by using the density functional theory calculation. We found that the electric field required for the half-metallicity can be significantly reduced by controlling the field direction and the reduction rate increases with the nanotube diameter. The field direction effect can be understood in a simple model based on the electrostatic potential difference between the spatially-separated edges.
- A. Half-metallic carbon nanotubes
- B. Hydrogenated carbon nanotubes
- C. Graphene nanoribbons
- D. Density functional theory
ASJC Scopus subject areas
- Materials Science(all)
- Physics and Astronomy(all)