Interaction of the ground state of quarter-filled one-dimensional strongly correlated electronic system with localized spins
Interaction of the ground state of quarter-filled one-dimensional strongly correlated electronic system with localized spins
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DOI：
10.1103/physrevlett.95.216402
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发表时间：
2005-11-18
影响因子：
8.6
通讯作者：
Fukuyama, H
中科院分区：
文献类型：
--
作者：
Hotta, C;Ogata, M;Fukuyama, H
用数值方法研究了局域S = 1/2自旋反铁磁相互作用的一维四分之一填充强相关电子系统的基态性质。结果表明，引入相对较小的局域自旋耦合可以显著地稳定电荷有序态。当耦合变大时，自旋自由度和电荷自由度完全独立，实现了铁磁性。此外，在强相互作用区，铁磁性与荷序共存。本文的理论结果将与酞菁类化合物的实验结果进行比较。
We study numerically the ground-state properties of the one-dimensional quarter-filled strongly correlated electronic system interacting antiferromagnetically with localized S = 1/2 spins. It is shown that the charge-ordered state is significantly stabilized by the introduction of relatively small coupling with the localized spins. When the coupling becomes large the spin and charge degrees of freedom behave quite independently and the ferromagnetism is realized. Moreover, the coexistence of ferromagnetism with charge order is seen in the strongly interacting region. The present theoretical results are to be compared with the experiments on phthalocyanine compounds.