2008/03/31 by Somnath Bhowmick, Vijay B. Shenoy
Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #Enhanced Data Rates for GSM Evolution #Ferromagnetism #Graphene #Graphene research and applications #Magnetism #Nanodot #Nanostructure #Topological Materials and Phenomena #Zigzag #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.2943678
published as THE JOURNAL OF CHEMICAL PHYSICS 128, 244717 (2008)
openalex publication_date 2008/06/28 · arxiv created 2008/07/04 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.