Electronic structure and x-ray spectra of defective oxides LixCoO2
| Autor(en): | Galakhov, V. R. Ovechkina, N. A. Shkvarin, A. S. Shamin, S. N. Kurmaev, E. Z. Kuepper, K. Takacs, A. F. Raekers, M. Robin, S. Neumann, M. Gavrila, G. -N. Semenova, A. S. Kellerman, D. G. Kaambre, T. Nordgren, J. |
Stichwörter: | ABSORPTION SPECTROSCOPY; EDGE; EMISSION; LACOO3; LICOO2; Materials Science; Materials Science, Multidisciplinary; NACO2O4; PHOTOELECTRON; Physics; Physics, Applied; Physics, Condensed Matter; TRANSITION | Erscheinungsdatum: | 2006 | Herausgeber: | AMERICAN PHYSICAL SOC | Journal: | PHYSICAL REVIEW B | Volumen: | 74 | Ausgabe: | 4 | Zusammenfassung: | X-ray absorption, resonant x-ray emission, and x-ray photoelectron spectra of the valence band and core levels have been measured for LixCoO2 (0.6 <= x <= 1.0). Resonant O K alpha x-ray emission spectra of LiCoO2 showed localized excitonic states due to a dd transition between unoccupied and occupied Co 3d states. On the basis of measurements of Co 3s x-ray photoelectron and Co 2p and O 1s x-ray absorption spectra it was established that in defective cobaltites the electronic holes are localized mainly in O 2p states. Evidence of phase separation in LixCoO2 has been found. |
ISSN: | 10980121 | DOI: | 10.1103/PhysRevB.74.045120 |
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