Oxygen Hole Character and Lateral Homogeneity in PrNiO2+δ Thin Films

Frontiers in Physics

Physics

M. Weigand¹  E. Schierle¹  G. Schütz²  S. Wintz²  G. Logvenov³  E. Benckiser³  K. Fürsich³  R. Pons³  M. Bluschke³  R. A. Ortiz³  B. Keimer³ 

[1] Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany;Max Planck Institute for Intelligent Systems, Stuttgart, Germany;Max Planck Institute for Solid State Research, Stuttgart, Germany;

关键词: infinite-layer nickelates;    x-ray absorption spectroscopy;    x-ray microscopy;    topotactical soft chemistry reduction;    rare-earth nickelates films;   

DOI  :  10.3389/fphy.2021.810220

 received in 2021-11-06, accepted in 2021-12-08,  发布年份 2022

来源: Frontiers

【 摘 要 】

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.

【 授权许可】

Unknown   
Copyright © 2022 Fürsich, Pons, Bluschke, Ortiz, Wintz, Schierle, Weigand, Logvenov, Schütz, Keimer and Benckiser.