| 反铁磁链的自旋Peierls相变 |
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| 引用本文： | 王治国,丁国辉,许伯威. 反铁磁链的自旋Peierls相变[J]. 物理学报, 1999, 48(2): 296-301 |
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| 作者姓名： | 王治国 丁国辉 许伯威 |
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| 作者单位： | 上海交通大学应用物理系，上海 200030 |
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| 基金项目： | 国家自然科学基金(批准号：19675026)资助的课题. |
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| 摘 要： | 通过费米-玻色变换将一维自旋1/2反铁磁链映射为连续玻色场形式，讨论了模型基态能量和激发态能量，证明了此系统存在自旋Peierls相变.并给出了模型基态能量密度与晶格畸变大小的关系.数值计算的结果验证了上述理论的正确性.关键词：
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| 关 键 词： | 自旋 P－相变 反铁磁链 F－P变换 |
| 收稿时间： | 1998-04-29 |
SPIN-PEIERLS TRANSITION OF THE ANTIFERROMAGNETIC CHAIN |
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| WANG ZHI-GUO,DING GUO-HUI and XU BO-WEI. SPIN-PEIERLS TRANSITION OF THE ANTIFERROMAGNETIC CHAIN[J]. Acta Physica Sinica, 1999, 48(2): 296-301 |
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| Authors: | WANG ZHI-GUO DING GUO-HUI XU BO-WEI |
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| Abstract: | By using the Fermi-Bose transformation, the antiferromagnetic chain is mapped into the bosonic field, and the energy density of the ground state and the excite states of the model are given. The relationship between the energy density of the ground state and the strength of distortion of the model is obtained. The results show that there exists a spin-Peierls transition in the model. Finally, the numerical simulation is performed to verify the above theoretical prediction. |
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