INTERCHAIN INTERACTIONS AND MAGNETIC PROPERTIES OF LI2CUO2
INTERCHAIN INTERACTIONS AND MAGNETIC PROPERTIES OF LI2CUO2
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LI2CuO2 的链间相互作用和磁性
DOI：
10.1103/physrevb.60.6230
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发表时间：
1999
影响因子：
3.7
通讯作者：
S. Maekawa
中科院分区：
文献类型：
--
作者：
Y. Mizuno;T. Tohyama;S. Maekawa
对于具有边共享链的绝缘铜酸盐，构造了一个有效的哈密顿量${\mathm{Li}}_{2}{\mathm{CuO}}_{2}，该哈密顿量包含最近和次近的相邻链内和锯齿形链间相互作用。通过对磁化率的分析，得到了相互作用的数值，发现该体系可描述为耦合的阻滞链。我们用精确对角化方法计算了动力学自旋关联函数S({q}，omega})，结果表明，S(q}，omega})的光谱是由锯齿型链间相互作用表征的。根据计算的能谱讨论了最近的非弹性中子散射实验的结果。
An effective Hamiltonian is constructed for an insulating cuprate with edge-sharing chains ${\mathrm{Li}}_{2}{\mathrm{CuO}}_{2}.$ The Hamiltonian contains the nearest and next-nearest neighboring intrachain and zigzag-type interchain interactions. The values of the interactions are obtained from the analysis of the magnetic susceptibility, and this system is found to be described as coupled frustrated chains. We calculate the dynamical spin correlation function $S(\mathbf{q},\ensuremath{\omega})$ by using the exact diagonalization method, and show that the spectra of $S(\mathbf{q},\ensuremath{\omega})$ are characterized by the zigzag-type interchain interactions. The results of the recent inelastic neutron-scattering experiment are discussed in the light of the calculated spectra.