Anomalous Interaction Dependence in Magnetism of Graphene Nanoribbons with Zigzag Edges
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概要
- 論文の詳細を見る
The properties in magnetic ordered states of graphene nanoribbons with zigzag-shaped edges are investigated by applying mean-field approximation to the Hubbard model with the on-site repulsion $U$. We observe that magnetic moments and critical temperature show anomalous power-law dependences as a function of $U$; the actual values of the power are determined by only the width of the ribbons. Such singular behaviours are found to be due to the localized nature of the electronic states close to the Fermi energy.
- 2010-08-15
著者
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Yoshioka Hideo
Department Of Oral And Maxillofacial Surgery Osaka Rosai Hospital
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Hideo Yoshioka
Department of Physics, Nara Women's University, Nara 630-8506, Japan
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Furukawa Karin
Department of Physics, Nara Women's University, Nara 630-8506, Japan
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Mochizuki Yoneko
Department of Physics, Nara Women's University, Nara 630-8506, Japan
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