期刊
PHYSICAL REVIEW B
卷 95, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.95.165124
关键词
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资金
- Czech Science Foundation [GACR 15-06759S]
- Grant Agency of Charles University [GAUK 472216]
- Hiroshima Synchrotron Radiation Center [13-B-12]
- Louisiana EPSCoR Program
- JSPS postdoctoral fellowship
- Alexander von Humboldt-Stiftung [P13783]
We have conducted resonant angle-resolved photoemission spectroscopy of well-defined CeO2(111) and c-Ce2O3(111) model surfaces, revealing distinct f contributions in the valence band of the two compounds. In conjunction with density functional theory calculations, we show that the f contribution in CeO2 is of a covalent nature, arising from hybridization with the O 2p bands. In contrast, c-Ce2O3 exhibits an almost nondispersive f state at 1.3 eV, which is indicative of almost negligible c-f hybridization.
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