TY - JOUR
T1 - Significant reduction of the triggering electric field for half-metallicity in hydrogenated carbon nanotubes by optimized field direction
AU - Lee, Kyu Won
AU - Lee, Cheol Eui
N1 - Funding Information:
This work was supported by the National Research Foundation of Korea (NRL Program 2012-0006259 , Cyclotron Users Program 2012029495 , and No. 20100-029418 ).
PY - 2013/7
Y1 - 2013/7
N2 - 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.
AB - 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.
KW - A. Half-metallic carbon nanotubes
KW - B. Hydrogenated carbon nanotubes
KW - C. Graphene nanoribbons
KW - D. Density functional theory
UR - http://www.scopus.com/inward/record.url?scp=84875369962&partnerID=8YFLogxK
U2 - 10.1016/j.cap.2013.01.026
DO - 10.1016/j.cap.2013.01.026
M3 - Article
AN - SCOPUS:84875369962
VL - 13
SP - 894
EP - 896
JO - Current Applied Physics
JF - Current Applied Physics
SN - 1567-1739
IS - 5
ER -