Spin Excitation in Nano-Graphite Ribbons with Zigzag Edges
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概要
- 論文の詳細を見る
Spin excitation in a nano-graphite ribbon with zigzag edges is investigated theoretically. Due to the strongly localized nature of the states near the Fermi energy, the effective Hamiltonian for the low-energy physics is given by the Heisenberg Hamiltonian with the nearest neighbor exchange coupling. The action corresponding to the effective Hamiltonian is mapped to that of the O(3) nonlinear sigma model. It is shown that the spin excitation has a gap when the number of the zigzag lines is even, whereas the excitation becomes gapless in the case of an odd number of zigzag lines.
- 社団法人日本物理学会の論文
- 2003-09-15
著者
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Yoshioka Hideo
Department of Physics, Nagoya University
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Yoshioka H
Department Of Materials Science And Engineering Kyoto Universit
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Yoshioka H
Nara Women's Univ. Nara
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Yoshioka Hideo
Department Of Physics Nara Women's University
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Yoshioka Hideo
Department Of Physics Faculty Of Science University Of Tokyo
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Yoshioka Hideo
Department Of Oral And Maxillofacial Surgery Osaka Rosai Hospital
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