Wang, Wei L. and Meng, Sheng and Kaxiras, Efthimios (2008) Graphene nanoflakes with large spin. NANO LETTERS, 8 (1). pp. 241-245.
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Official URL: http://dx.doi.org/10.1021/nl072548a
Abstract
We investigate, using benzenoid graph theory and first-principles calculations, the magnetic properties of arbitrarily shaped finite graphene fragments to which we refer as graphene nanoflakes (GNFs). We demonstrate that the spin of a GNF depends on its shape due to topological frustration of the pi-bonds. For example, a zigzag-edged triangular GNF has a nonzero net spin, resembling an artificial ferrimagnetic atom, with the spin value scaling with its linear size. In general, the principle of topological frustration can be used to introduce large net spin and interesting spin distributions in graphene. These results suggest an avenue to nanoscale spintronics through the sculpting of graphene fragments.
| Item Type: | Article |
|---|---|
| Subjects: | Physical Science > Nano objects Physical Science > Nanomagnetics Material Science > Nanostructured materials Material Science > Nanochemistry |
| ID Code: | 2319 |
| Deposited By: | Anuj Seth |
| Deposited On: | 18 Dec 2008 13:59 |
| Last Modified: | 20 Jan 2009 10:40 |
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