OXYGEN-1S AND COBALT-2P X-RAY ABSORPTION OF COBALT OXIDES
| Autor: | Degroot, F. M. F., Miguel Abbate, Vanelp, J., Sawatzky, G. A., Ma, Y. J., Chen, C. T., Sette, F. |
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| Přispěvatelé: | Applied Physics |
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| Zdroj: | ResearcherID Journal of Physics-Condensed Matter, 5(14), 2277-2288. IOP PUBLISHING LTD |
| ISSN: | 0953-8984 |
| Popis: | The oxygen ls and cobalt 2p x-ray absorption spectra of CoO, Li-doped CoO and LiCoO2 have been measured with 0.1 eV resolution. The cobalt 2p spectra are analysed with a ligand-field multiplet model and the inclusion of charge-transfer effects is discussed. The oxygen ls spectra are interpreted as transitions to empty oxygen p states and it is concluded that the effects of correlations in the 3d band possibly are too small to be detectable. The symmetries and the electronic configurations of the cobalt ions in the oxides are determined. It is concluded that, in contrast to for example NiO and La2CuO4, the doping-induced states are possibly of 1A1 symmetry, which would imply that the quasi-particles have spin 3/2 and are most likely trapped. |
| Databáze: | OpenAIRE |
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