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首页> 外文期刊>Physical Review X >Site-Selective Probe of Magnetic Excitations in Rare-Earth Nickelates Using Resonant Inelastic X-ray Scattering
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Site-Selective Probe of Magnetic Excitations in Rare-Earth Nickelates Using Resonant Inelastic X-ray Scattering

机译：使用谐振非弹性X射线散射稀土镍酯磁激发的位点选择性探针

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We use high-resolution resonant inelastic x-ray scattering (RIXS) to study a thin film of NdNiO 3 , a compound whose unusual spin- and bond-ordered electronic ground state has been of long-standing interest. Below the magnetic ordering temperature, we observe well-defined collective magnon excitations along different high-symmetry directions in momentum space. The magnetic spectra depend strongly on the incident photon energy, which we attribute to RIXS coupling to different local electronic configurations of the expanded and compressed NiO 6 octahedra in the bond-ordered state. Both the noncollinear magnetic ground state and the observed site-dependent magnon excitations are well described by a model that assumes strong competition between the antiferromagnetic superexchange and ferromagnetic double-exchange interactions. Our study provides direct insight into the magnetic dynamics and exchange interactions of the rare-earth nickelates and demonstrates that RIXS can serve as a site-selective probe of magnetism in these and other materials.
机译：我们使用高分辨率共振非弹性X射线散射（RIX）来研究NDNIO 3的薄膜，这是一种不寻常的自旋和键合的电子地面状态的化合物，其具有长期兴趣。低于磁性有序温度，我们在动量空间中沿着不同的高对称方向观察明确定义的集体巨头激励。磁光谱强烈地取决于事件光子能量，我们将rixs耦合到粘接状态下的扩展和压缩NiO 6八面型八八八八八八八点的不同局部电子配置。非可口磁场和观察到的位点依赖性巨头激励均通过假设反铁磁体超速和铁磁双交换相互作用的强烈竞争的模型很好地描述。我们的研究提供了进入磁性动力学和稀土镍的交换相互作用的直接洞察，并表明RIX可以作为这些和其他材料中的磁性的位点选择性探针。

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