| 最近邻Coulomb相互作用对纳米石墨带铁磁基态的影响 |
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| 引用本文： | 朱丽娅.最近邻Coulomb相互作用对纳米石墨带铁磁基态的影响[J].三峡大学学报(自然科学版),2007,29(2):187-189. |
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| 作者姓名： | 朱丽娅 |
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| 作者单位： | 三峡大学,理学院,湖北,宜昌,443002 |
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| 摘 要： | 基于Peierls-extended Hubbard模型,采用Hartree-Fock近似,研究了最近邻Coulomb相互作用V对纳米石墨带铁磁基态稳定性的影响.结果表明,当V增大到某一临界值时,铁磁基态变得不稳定,同时系统从自旋密度波态过渡到电荷密度波态.
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| 关 键 词： | Coulomb相互作用 纳米石墨带 铁磁基态 |
| 文章编号： | 1672-948X(2007)02-0187-03 |
| 修稿时间： | 2006年11月8日 |
Effects of Nearest-Neighbor Coulomb Interaction on Ferromagnetic Ground State in Nanographite Ribbons |
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| Zhu Liya.Effects of Nearest-Neighbor Coulomb Interaction on Ferromagnetic Ground State in Nanographite Ribbons[J].Journal of China Three Gorges University(Natural Sciences),2007,29(2):187-189. |
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| Authors: | Zhu Liya |
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| Abstract: | Based on the Peierls-extended Hubbard model,the effects of the nearest-neighbor Coulomb interaction on the ferromagnetic ground state in the nanographite ribbons are studied by means of Hartree-Fock approximation.The result shows that if the intersite Coulomb interaction V is larger than a critical value,the ground state is unstable and the transition from the spin-density-wave state to the charge-density-wave state occurs. |
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| Keywords: | Coulomb interaction nanographite ribbons ferromagnetic ground state |
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