Oxygen Hole Character and Lateral Homogeneity in PrNiO2 delta Thin Films
| Autor: | K. Fürsich, R. Pons, M. Bluschke, R. A. Ortiz, S. Wintz, E. Schierle, M. Weigand, G. Logvenov, G. Schütz, B. Keimer, E. Benckiser |
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| Rok vydání: | 2022 |
| Předmět: |
rare-earth nickelates films
topotactical soft chemistry reduction Materials Science (miscellaneous) infinite-layer nickelates x-ray microscopy Physics QC1-999 Biophysics General Physics and Astronomy Large scale facilities for research with photons neutrons and ions Physical and Theoretical Chemistry x-ray absorption spectroscopy Mathematical Physics |
| Zdroj: | Frontiers in Physics, Vol 9 (2022) |
| Popis: | Using x-ray absorption spectroscopy with lateral resolution from the submillimeter to submicrometer range, we investigate the homogeneity, the chemical composition, and the nickel 3d- oxygen 2p charge transfer in topotactically reduced epitaxial PrNiO2+δ thin films. To this end, we use x-ray absorption spectroscopy in a standard experimental setup and in a soft x-ray microscope to probe the element and spatially resolved electronic structure modifications through changes of the nickel-2p and oxygen-1s absorption spectrum upon soft-chemistry reduction. We find that the reduction process is laterally homogeneous across a partially reduced PrNiO2+δ thin film sample for length scales down to 50 nm. |
| Databáze: | OpenAIRE |
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