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Half metallicty in finite-length zigzag single walled carbon nanotube: a first-principle prediction

journal contribution
posted on 01.09.2008, 00:00 authored by A J Du, Ying (Ian) ChenYing (Ian) Chen, G Q Lu, S C Smith
We predict here from first-principle calculations that finite-length (n,0) single walled carbon nanotubes (SWCNTs) with H-termination at the open ends displaying antiferromagnetic coupling when n is greater than 6. An opposite local gating effect of the spin states, i.e., half metallicity, is found under the influence of an external electric field along the direction of tube axis. Remarkably, boron doping of unpassivated SWCNTs at both zigzag edges is found to favor a ferromagnetic ground state, with the B-doped tubes displaying half-metallic behavior even in the absence of an electric field. Aside of the intrinsic interest of these results, an important avenue for development of CNT-based spintronic is suggested. © 2008 American Institute of Physics.

History

Journal

Applied physics letters

Volume

93

Issue

7

Pagination

2 - 4

Publisher

AIP Publishing

Location

Melville, United States

ISSN

0003-6951

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2008, American Institute of Physics