4f-derived photoemission and 4f-ligand hybridization in light rare-earth halides.
4f-derived photoemission and 4f-ligand hybridization in light rare-earth halides.
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轻稀土卤化物中 4f 衍生的光电子发射和 4f 配体杂交。
DOI：
10.1103/physrevb.38.7789
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Sato
中科院分区：
文献类型：
--
作者：
Fujimori;Miyahara;Koide;Shidara;Kato;Fukutani;Sato
我们用共振光发射光谱法研究了绝缘铈、镨和钕三卤化物的4f衍生光发射光谱。在每个f谱中都观察到双峰结构，如金属Ce， Pr和Nd化合物，并成功地根据簇模型进行了分析。这证实了这两个峰是由4f和配体p轨道之间的杂化引起的，而不是由f孔的两个不同的筛选通道引起的。从Ce到Pr再到Nd， f-配体的杂化强度减小，但对于较重的稀土化合物，f-配体的杂化强度仍然很大，这表明杂化效应在重稀土化合物中的重要性。
We have studied the 4f-derived photoemission spectra of insulating Ce, Pr, and Nd trihalides by resonant photoemission spectroscopy. A double-peak structure is observed in every f spectrum as in metallic Ce, Pr, and Nd compounds and is successfully analyzed in terms of the cluster model. This confirms that the two peaks arise from hybridization between the 4f and ligand p orbitals rather than from two different screening channels of the f hole. The f-ligand hybridization strength is found to decrease on going from the Ce to Pr to Nd compounds, but appears to remain significantly large for heavier rare earths, suggesting the importance of hybridization effects in heavy rare-earth compounds.