Nano Archive

Edge state magnetism of single layer graphene nanostructures

Bhowmick, Somnath and Shenoy, Vijay B (2008) Edge state magnetism of single layer graphene nanostructures. The Journal of Chemical Physics, 128 . pp. 244717-1.

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Official URL: http://link.aip.org/link/?JCPSA6/128/244717/1

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
Subjects:Physical Science > Nano objects
Physical Science > Nanomagnetics
Material Science > Nanostructured materials
Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3438
Deposited By:JNCASR
Deposited On:20 Jan 2009 10:10
Last Modified:20 Jan 2009 10:10

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