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Half metallicity in a zigzag double-walled nanotube nanodot : an ab initio prediction

journal contribution
posted on 01.01.2009, 00:00 authored by A Du, Z Zhu, C Sun, Ying (Ian) ChenYing (Ian) Chen, G Lu, S Smith
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.

History

Journal

Chemical physics letters

Volume

468

Issue

4-6

Pagination

257 - 259

Publisher

Elsevier B V

Location

Amsterdam, The Netherlands

ISSN

0009-2614

eISSN

1873-4448

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2008 Elsevier B.V.