Abstract
We investigate the electronic structure of carbon nanotubes
functionalized by adsorbates anchored with single C-C covalent bonds. We
find that despite the particular adsorbate, a spin moment with a
universal value of 1.0 μB per molecule is induced at low
coverage. Therefore, we propose a mechanism of bonding-induced magnetism
at the carbon surface. The adsorption of a single molecule creates a
dispersionless defect state at the Fermi energy, which is mainly
localized in the carbon wall and presents a small contribution from the
adsorbate. This universal spin moment is fairly independent of the
coverage as long as all the molecules occupy the same graphenic
sublattice. The magnetic coupling between adsorbates is also studied and
reveals a key dependence on the graphenic sublattice adsorption site.
Original language | English |
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Pages (from-to) | 62503 |
Journal | Applied Physics Letters |
Volume | 99 |
Issue number | 6 |
DOIs | |
Publication status | Published - 01 Aug 2011 |
Externally published | Yes |