Spectroscopic Evidence for Localized and Extended F-Symmetry States in Ceo2
Spectroscopic Evidence for Localized and Extended F-Symmetry States in Ceo2
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DOI：
10.1103/physrevlett.53.202
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发表时间：
1984-07
影响因子：
8.6
通讯作者：
E. Wuilloud;B. Delley;W. Schneider;Y. Baer
中科院分区：
文献类型：
--
作者：
E. Wuilloud;B. Delley;W. Schneider;Y. Baer
用高能光谱学研究了绝缘体Ce {\ mathm {O}}_{2}$的已占据电子态和空电子态。外能级光谱显示带隙内空的局域$4{f}^{1}$态。核能级谱显示出不同的$4f$定域态的最终态居群，这些定域态的最终态居群可以通过考虑价带中$f$-对称杂合的多体计算得到很好的预测。在Ce${\ mathm {O}}_{2}$中可以明确地排除混合价。
The occupied and empty electronic states of the insulator Ce${\mathrm{O}}_{2}$ have been studied by high-energy spectroscopies. The outer-level spectra reveal empty localized $4{f}^{1}$ states within the band gap. The core-level spectra display different final-state populations of the $4f$ localized states which are well predicted by a many-body calculation taking into account the presence of $f$-symmetry admixture in the valence band. A mixed valence can be definitely excluded in Ce${\mathrm{O}}_{2}$.