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Magnetism of C adatoms on BN nanostructures : implications for functional nanodevices
journal contribution
posted on 2009-02-11, 00:00 authored by J Li, G Zhou, Ying (Ian) ChenYing (Ian) Chen, B L Gu, W DuanSpin-polarized density functional calculations reveal that magnetism can be induced by carbon adatoms on boron nitride nanotubes (BNNTs) and BN hexagonal sheets. As a result of the localization of impurity states, these hybrid sp-electron systems are spin-polarized, with a local magnetic moment of 2.0 μB per C adatom regardless of the tube diameter and the bonding between the C atom and the BNNTs/BN sheets. An analysis of orbital hybridization indicates that two valence electrons participate in the bonding and the remaining two electrons of the C adatom are confined at the adsorption site and contribute to the magnetism accordingly. The effective interaction distance between the C-induced magnetic moments is evaluated. In terms of the diffusion barrier and the adsorption energy of C adatoms on the BN nanotubes/ sheets, a fabrication method for BN-C-based functional nanodevices is proposed, and a series of virtual building blocks for functional devices are illustrated.
History
Journal
Journal of the american chemical societyVolume
131Issue
5Pagination
1796 - 1801Publisher
American Chemical SocietyLocation
Washington, DCPublisher DOI
ISSN
0002-7863eISSN
1520-5126Language
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2009, American Chemical SocietyUsage metrics
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