Spin Excitation in Nano-Graphite Ribbons with Zigzag Edges
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- Yoshioka Hideo
- Department of Physics, Nara Women’s University
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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.
収録刊行物
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- Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ
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Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ 72 (9), 2145-2148, 2003
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679164204672
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- NII論文ID
- 110001974297
- 130004538505
- 210000104407
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- NII書誌ID
- AA00704814
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- BIBCODE
- 2003JPSJ...72.2145Y
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 6684794
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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- 使用不可
