Core level and valence band spectroscopy of SrRu03 : Electron correlation and covalence effects
Core level and valence band spectroscopy of SrRu03 : Electron correlation and covalence effects
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SrRu03 的核心能级和价带光谱：电子关联和共价效应
DOI：
10.1103/physrevb.86.235127
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
and R. J. 0. Mossanek
中科院分区：
文献类型：
--
作者：
E. B. Guedes;M. Abbate;K. Ishigami;A. Fujimori;K. Yoshimatsu;H. Kumigashira;M. Oshima;F. C. Vicentin;P. T. Fonseca;and R. J. 0. Mossanek
我们利用多种光谱技术研究了srru的电子结构。这些包括（共振）光发射，x射线吸收和光电导率。实验结果用扩展簇模型解释，该模型考虑了电子相关和Ru 4- o2的共价。分析表明，该材料处于负电荷转移区，基态由4d5L偶结构主导，占有47。这主要是由于Ru 4态中较大的晶体场和交换分裂所致。srruis的电子结构受Ru 4- o2杂化的强烈影响。因此，在分析该体系的物理性质时应明确考虑氧态。然而，相关效应在该系统中也很重要，在价带光谱中产生相干峰。
We studied the electronic structure of SrRuOusing several spectroscopic techniques. These include (resonant) photoemission, x-ray absorption, and optical conductivity. The experimental results were interpreted using an extended cluster model, which takes into account electron correlation and the Ru 4-O 2covalence. The analysis shows that this material is in the negative charge transfer regime, where the ground state is dominated by the 4d5L̲ configuration with an occupation of 47. This is mainly due to the relatively large crystal field and exchange splitting in the Ru 4states. The electronic structure of SrRuOis strongly influenced by the Ru 4-O 2hybridization. Thus, the oxygen states should be explicitly considered in the analysis of the physical properties of this system. However, correlation effects are also important in this system giving rise to the coherent peak in the valence band spectra.