Local Magnetic Moment Formation on Edges of Graphene(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Local magnetic moment formation on edges of graphene is studied using the Hubbard model on a honeycomb lattice. The Coulomb interaction is treated with the mean field approximation. Realistic edges of graphene are composed of zigzag and armchair parts. It is found that, on a zigzag part of length na larger than 3a, where a is the lattice constant, local staggered moment whose magnitude is proportional to the length of the zigzag part, is developed, i.e., a zigzag part of length 3a is sufficient for generation of local magnetism. This also means that one has to get rid of zigzag parts of n≥3 to suppress local edge magnetism of graphene.
- 社団法人日本物理学会の論文
- 2008-04-15
著者
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HIRASHIMA Dai
Department of Physics, Nagoya University
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Hirashima Dai
Department Of Physics Nagoya University
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KUMAZAKI Hideki
Department of Physics, Nagoya University
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Kumazaki Hideki
Department Of Physics Nagoya University
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