Zigzag Magnetic Order in the Iridium Oxide Na2IrO3
Zigzag Magnetic Order in the Iridium Oxide Na2IrO3
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DOI：
10.1103/physrevlett.110.097204
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发表时间：
2013-02-28
影响因子：
8.6
通讯作者：
Khaliullin, Giniyat
中科院分区：
文献类型：
--
作者：
Chaloupka, Jiri;Jackeli, George;Khaliullin, Giniyat
我们在扩展至其完整参数空间的 Kitaev-Heisenberg 模型中探索了蜂窝晶格上自旋轨道莫特绝缘体的相图。锯齿型磁序占据了模型相图的很大一部分，其物理起源被解释为轨道间 t(2g) - e(g) 跳跃。计算磁化率、自旋波谱和Z字形有序参数，并与实验数据进行比较，从而得到Na2IrO3和Li2IrO3中的自旋耦合常数。 DOI：10.1103/PhysRevLett.110.097204
We explore the phase diagram of spin-orbit Mott insulators on a honeycomb lattice, within the Kitaev-Heisenberg model extended to its full parameter space. Zigzag-type magnetic order is found to occupy a large part of the phase diagram of the model, and its physical origin is explained as due to interorbital t(2g) - e(g) hopping. The magnetic susceptibility, spin wave spectra, and zigzag order parameter are calculated and compared to the experimental data, obtaining thereby the spin coupling constants in Na2IrO3 and Li2IrO3. DOI: 10.1103/PhysRevLett.110.097204