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arXiv 1102.4414cond-mat.str-el
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S=1/2海森堡自旋链中的挫挫感生亚铁磁性

Frustration-Induced Ferrimagnetism in S=1/2 Heisenberg Spin Chain

Tokuro Shimokawa, Hiroki Nakano

摘要:

利用精确对角化方法和密度矩阵重整化群方法研究了S=1/2受抑海森堡自旋链的基态性质.我们的数值计算澄清,亚铁磁态实现的基态,尽管事实上,在系统的形状的多子晶格结构是缺席。我们发现有两种类型的亚铁磁相:一种是众所周知的Lieb-Mattis型亚铁磁相,另一种是不同于Lieb-Mattis型的非平凡亚铁磁相。我们的研究结果表明,一个多子晶格结构的形状是不一定需要亚铁磁性的发生。

英文摘要:

The ground-state properties of the S=1/2 frustrated Heisenberg spin chain with interactions up to fourth nearest neighbors are investigated by the exact-diagonalization method and density matrix renormalization group method. Our numerical calculations clarify that the ferrimagnetic state is realized in the ground state in spite of the fact that a multi-sublattice structure in the shape of the system is absent. We find that there are two types of ferrimagnetic phases: one is the well-known ferrimagnetic phase of the Lieb-Mattis type and the other is the nontrivial ferrimagnetic phase that is different from that of the Lieb-Mattis type. Our results suggest that a multi-sublattice structure of the shape is not necessarily required for the occurrence of ferrimagnetism.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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