Kitaev-Heisenberg-J2-J3 model for the iridates A2IrO3
Kitaev-Heisenberg-J2-J3 model for the iridates A2IrO3
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DOI：
10.1103/physrevb.84.180407
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发表时间：
2011-11-10
影响因子：
3.7
通讯作者：
You, Yi-Zhuang
中科院分区：
文献类型：
--
作者：
Kimchi, Itamar;You, Yi-Zhuang
提出了描述Mott绝缘层状铱酸盐A（2）IrO（3）（A = Na，Li）的Akitaev-Heisenberg-J（2）-J（3）模型.该模型是Kitaev蜂窝模型和海森堡模型的组合，具有所有三个最近邻耦合J（1），J（2）和J（3）。在经典水平上得到了丰富的相图，包括实验上提出的锯齿形有序相，以及从Kitaev-Heisenberg极限延伸到J（1）-J（2）-J（3）极限的条纹相。结合实验观察到的自旋顺序与均匀磁化率数据的最佳拟合给出了可能的参数值的估计，这反过来又重申了包括Kitaev和更远的邻居耦合的必要性。
AKitaev-Heisenberg-J(2)-J(3) model is proposed to describe the Mott-insulating layered iridates A(2)IrO(3) (A = Na, Li). The model is a combination of the Kitaev honeycomb model and the Heisenberg model with all three nearest-neighbor couplings J(1), J(2), and J(3). A rich phase diagram is obtained at the classical level, including the experimentally suggested zigzag ordered phase; as well as the stripy phase, which extends from the Kitaev-Heisenberg limit to the J(1)-J(2)-J(3) one. Combining the experimentally observed spin order with the optimal fitting to the uniform magnetic susceptibility data gives an estimate of possible parameter values, which in turn reaffirms the necessity of including both the Kitaev and farther neighbor couplings.