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首页> 外文期刊>Solid State Communications >Intra-versus inter-site electronic excitations in NdNiO3 by resonant inelastic ultra-soft X-ray scattering at Ni 3p edge
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Intra-versus inter-site electronic excitations in NdNiO3 by resonant inelastic ultra-soft X-ray scattering at Ni 3p edge

机译：在Ni 3p边缘通过共振非弹性超软X射线散射在NdNiO3中进行内部位间电子激发

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摘要

Resonant ultra-soft X-ray scattering measurements performed on NiO, as a model system, and NdNiO3 reveal the presence of pronounced inelastic structures within a few eV below the elastic peak in both cases. A comparison of experimental data with the results of Anderson impurity model calculations indicates that for both oxides the inelastic part of recorded spectra mainly originates from the intra-atomic d-d excitations. Remarkably, no distinct signal from inter-site d-d transitions can be identified for both metallic and insulating NdNiO3 at small energy-losses. The lack of significant spectral contribution from the latter transitions in this compound indicates that states on the top (bottom) of the valence (conduction) band have predominantly O 2p character and the NdNiO3 insulator is rather of a p-p type. (C) 2005 Elsevier Ltd. All rights reserved.
机译：在这两种情况下，在作为模型系统的NiO和NdNiO3上进行的共振超软X射线散射测量揭示了在弹性峰以下几个eV内存在明显的非弹性结构。实验数据与Anderson杂质模型计算结果的比较表明，对于两种氧化物，记录光谱的非弹性部分主要源自于原子内d-d激发。值得注意的是，在能量损失较小的情况下，对于金属和绝缘NdNiO3都无法识别出来自站点间d-d跃迁的明显信号。该化合物中后一个跃迁缺乏明显的光谱贡献，这表明价（导）带顶部（底部）的状态主要具有O 2p特性，而NdNiO3绝缘体不是p-p型。 （C）2005 Elsevier Ltd.保留所有权利。

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