Edge state magnetism of single layer graphene nanostructures

Bhowmick, Somnath ; Shenoy, Vijay B. (2008) Edge state magnetism of single layer graphene nanostructures The Journal of Chemical Physics, 128 (24). Article ID 244717. ISSN 0021-9606

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Official URL: http://aip.scitation.org/doi/abs/10.1063/1.2943678

Related URL: http://dx.doi.org/10.1063/1.2943678

Abstract

We study edge state magnetism in graphene nanostructures using a mean field theory of the Hubbard model. We investigate how the magnetism of the zigzag edges of graphene is affected by the presence of other types of terminating edges and defects. By a detailed study of both regular shapes, such as polygonal nanodots and nanoribbons, and irregular shapes, we conclude that the magnetism in zigzag edges is very robust. Our calculations show that the zigzag edges that are longer than three to four repeat units are always magnetic, irrespective of other edges, regular or irregular. We, therefore, clearly demonstrate that the edge irregularities and defects of the bounding edges of graphene nanostructures do not destroy the edge state magnetism.

Item Type:Article
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ID Code:105923
Deposited On:01 Feb 2018 09:52
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