Reversible control of the electronic density of states at the Fermi level of Ca3Co4O9+δ misfit-layered oxide single crystals through O+/H+ plasma exposure
| Autor: | M. G. Garnier, Lassi Karvonen, Andrey Shkabko, Anke Weidenkaff, D. Moser, Philipp Aebi |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Population Oxide Analytical chemistry chemistry.chemical_element 02 engineering and technology 01 natural sciences Oxygen symbols.namesake chemistry.chemical_compound 0103 physical sciences General Materials Science 010306 general physics Spectroscopy education education.field_of_study Mechanical Engineering Fermi level 021001 nanoscience & nanotechnology Plasma exposure chemistry Mechanics of Materials symbols Charge carrier 0210 nano-technology Intensity (heat transfer) |
| Zdroj: | Journal of Materials Science |
| ISSN: | 1573-4803 0022-2461 |
| DOI: | 10.1007/s10853-012-6880-6 |
| Popis: | Misfit-layered Ca3Co4O9 crystals were grown and characterized via XRD, SEM, and photo-emission spectroscopy (PES). The evolution of the intensity at the Fermi level (EF) with varying oxygen content was studied by PES. Oxygen species were successfully introduced and removed through O+ and H+ microwave-plasma (2.45 GHz, 2–5 mbar) treatments, respectively. A 5 min O+ plasma exposure was observed to result into a drastic enhancement in the EF intensity, demonstrating the influence of oxygen content to the charge carrier population in layered cobalt-oxide materials. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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