| 海森堡链SP相变与磁耦合系数的关系 |
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| 引用本文： | 陈泽章,徐彦,梁彦天.海森堡链SP相变与磁耦合系数的关系[J].信阳师范学院学报(自然科学版),2014(4):502-504. |
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| 作者姓名： | 陈泽章 徐彦 梁彦天 |
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| 作者单位： | 1. 新乡学院 物理与电子工程学院，河南 新乡453003; 河南师范大学 物理与电子工程学院，河南 新乡453007
2. 新乡学院 物理与电子工程学院,河南 新乡,453003 |
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| 基金项目： | 河南省基础与前沿技术研究计划项目(132300410007)；新乡学院理论物理重点学科专项基金 |
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| 摘 要： | 在考虑自旋和晶格之间的相互作用情况下,用密度矩阵重整化群方法分析计算了一个自旋为12的一维受阻挫海森堡反铁磁自旋链模型发生自旋-派尔斯相变时动态二聚体与磁耦合系数之间的关系,发现当磁耦合系数趋于0时,在有限阻挫及有限能隙的零耦合状态下,二聚化态将会消失.
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| 关 键 词： | 海森堡链 相变 磁耦合系数 |
The Relations between Heisenberg Chain SP Phase Transitions and Magnetic Coupling Coefficient |
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| Chen Zezhang,Xu Yan,Liang Yantian.The Relations between Heisenberg Chain SP Phase Transitions and Magnetic Coupling Coefficient[J].Journal of Xinyang Teachers College(Natural Science Edition),2014(4):502-504. |
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| Authors: | Chen Zezhang Xu Yan Liang Yantian |
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| Institution: | Chen Zezhang;Xu Yan;Liang Yantian;College of Physics and Electronic Engineering,Xinxiang University;College of Physics and Electronic Engineering,Henan Normal University; |
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| Abstract: | In considering the interaction between the spin and lattice case,the relation between dynamic dimer and magnetic coupling coefficient was analysized with the density matrix renormalization group method when a one-dimensional blocked frustrated Heisenberg antiferromagnetic spin chain model occurred Spin-Peierls phase change. The results demonstrated that when the magnetic coupling coefficient tends to 0,the dimerization state would disappears in the state for the zero coupling between the limited and finite energy gap. |
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| Keywords: | Heisenberg chain phase transition magnetic coupling coefficient |
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