Electronic structure and electron energy-loss spectra of Sr0.35CoO2

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dc.creatorXiao, R. J.
dc.creatorYang, H. X.
dc.creatorXu, L. F.
dc.creatorZhang, H. R.
dc.creatorShi, Y. G.
dc.creatorLi, J. Q.
dc.date2006-12-07
dc.date.accessioned2026-07-07T07:31:35Z
dc.date.available2026-07-07T07:31:35Z
dc.descriptionThe electronic structure of Sr0.35CoO2, structurally analogous to the layered NaxCoO2, has been evaluated using the local spin density approximation (LSDA). We find that evident c-dispersions appear in both the e'g and a1g 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 5eV to 8eV) in the NaxCoO2 materials.
dc.description16 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0612182
dc.identifierhttp://arxiv.org/abs/cond-mat/0612182
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/118807
dc.subjectStrongly Correlated Electrons
dc.titleElectronic structure and electron energy-loss spectra of Sr0.35CoO2
dc.typetext

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