Abstract
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.
Original language | English |
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Pages (from-to) | 257-259 |
Number of pages | 3 |
Journal | Chemical Physics Letters |
Volume | 468 |
Issue number | 4-6 |
DOIs | |
Publication status | Published - 22 Jan 2009 |