Nano Archive

Graphene nanoflakes with large spin

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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