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Electronic structure and electron energy-loss spectra of Sr0.35CoO2
- Source :
-
Solid State Communications . Sep2005, Vol. 135 Issue 11/12, p687-691. 5p. - Publication Year :
- 2005
-
Abstract
- Abstract: The electronic structure of Sr0.35CoO2, structurally analogous to the layered Na x CoO2, has been evaluated using the local spin density approximation (LSDA). We find that evident c-dispersions appear in both the and a 1g Co-derived bands, demonstrating the existence of a notable interplanar interaction in Sr0.35CoO2. The LSDA+U calculation reveals that the electronic structure, in particular the band splitting between the spin-up and spin-down electrons, changes evidently along with the increase of the effective on-site Coulomb interaction U. Analysis of theoretical and experimental electron energy-loss spectra (EELS) for the oxygen K-edge and the Co L23-edge suggests that the on-site interaction (U) in Sr0.35CoO2 is less than 3eV which is noticeably weaker than the estimated value (from 5 to 8eV) in the Na x CoO2 materials. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00381098
- Volume :
- 135
- Issue :
- 11/12
- Database :
- Academic Search Index
- Journal :
- Solid State Communications
- Publication Type :
- Academic Journal
- Accession number :
- 18214047
- Full Text :
- https://doi.org/10.1016/j.ssc.2005.06.013