Significant reduction of the triggering electric field for half-metallicity in hydrogenated carbon nanotubes by optimized field direction
Significant reduction of the triggering electric field for half-metallicity in hydrogenated carbon nanotubes by optimized field direction
- 주제(키워드) Half-metallic carbon nanotubes , Hydrogenated carbon nanotubes , Graphene nanoribbons , Density functional theory
- 발행기관 한국물리학회
- 발행년도 2013
- 총서유형 Journal
- UCI G704-001115.2013.13.5.001
- KCI ID ART001790772
- 본문언어 영어
초록/요약
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 spatiallyseparated edges.
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