Hybridization of magnetic excitations between quasi-one-dimensional spin chains and spin dimers in Cu3Mo2O9observed using inelastic neutron scattering
Hybridization of magnetic excitations between quasi-one-dimensional spin chains and spin dimers in Cu3Mo2O9observed using inelastic neutron scattering
复制标题
使用非弹性中子散射观察 Cu3Mo2O9 中准一维自旋链和自旋二聚体之间的磁激发杂交
DOI：
10.1103/physrevb.83.184423
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发表时间：
2011
影响因子：
3.7
通讯作者：
K. Kakurai
中科院分区：
文献类型：
--
作者：
H. Kuroe;T. Hamasaki;T. Sekine;M. Hase;K. Oka;T. Ito;H. Eisaki;K. Kaneko;N. Metoki;M. Matsuda;K. Kakurai
本文用中子非弹性散射研究了CuMoO中两种磁激发的交换作用和杂化效应。该化合物具有两个磁性子系统，即，准一维（q1 D）反铁磁（AF）自旋系统和量子自旋二聚体。我们观察到两个分支的磁激励，并获得如下的磁参数。我们评估了q1 D AF自旋系统中的链内相互作用和自旋二聚体中的二聚体内相互作用。应用链间平均场理论（CMF）和随机相位近似（RPA），我们估计q1 D AF自旋系统的质量能隙为1.2 meV.利用CMF-RPA理论，估算了晶胞内沿着轴向的磁链间的铁磁链间相互作用和晶胞中心和角部磁链间的AF相互作用分别为eV。表示子系统间相互作用的杂化参数具有波矢依赖性，其中，meV和表示磁激励沿着方向的波矢。由q1 D AF自旋系统的磁激发产生的分子场的调制在这种杂化中起着重要的作用。
We have studied the exchange interactions and the hybridization effects of two kinds of magnetic excitations in CuMoOby using inelastic neutron scattering. This compound has two magnetic subsystems, i.e., the quasi-one-dimensional (q1D) antiferromagnetic (AF) spin system and the quantum spin dimers. We observe two branches in the magnetic excitations and obtain the magnetic parameters as follows. We evaluate the intrachain interactionmeV in the q1D AF spin system and the intradimer interactionmeV in the spin dimers. Applying the interchain mean-field theory (CMF) with the random-phase approximation (RPA), we estimate the mass gap of the q1D AF spin system as 1.2 meV. Using the CMF-RPA theory, the ferromagnetic interchain interaction between the magnetic chain along theaxis and the AF one between the magnetic chains at the center and the corner of the unit cell are estimated to bemeV, respectively. The hybridization parameter, which represents the intersubsystem interaction, has the wave-vector dependence as, wheremeV anddenotes the wave vector of magnetic excitation along thedirection. The modulation of the molecular field generated by the magnetic excitation of the q1D AF spin system plays an important role in this hybridization.