Half metallicity in a zigzag double-walled nanotube nanodot : an ab initio prediction
Data(s) |
01/01/2009
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Resumo |
Ab initio density functional calculations were performed to study finite-length zigzag (7, 0) @ (16, 0) double-walled carbon nanotubes (DWCNTs) with H-termination at the open ends. We find that such a DWCNT nanodot displays a very large magnetic moment at the zigzag edges and the ground state displays symmetric anti-ferromagnetic coupling. When an external electric field is applied along the direction of tube axis, a gap is opened for one spin channel, whereas another spin channel remains metallic, i.e. half metallicity occurs. Our results suggest an important new avenue for the development of CNT-based spintronic materials with enhanced properties. © 2008 Elsevier B.V. All rights reserved.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Elsevier B V |
Relação |
http://dro.deakin.edu.au/eserv/DU:30029173/chen-halfmetallicity-2009.pdf http://dx.doi.org/10.1016/j.cplett.2008.12.043 |
Direitos |
2008 Elsevier B.V. |
Tipo |
Journal Article |