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Synthesis and electronic properties of Nd$_{n+1}$Ni$_{n}$O$_{3n+1}$ Ruddlesden-Popper nickelate thin films
- Source :
- Phys. Rev. Materials 6, 055003 (2022)
- Publication Year :
- 2022
-
Abstract
- The rare-earth nickelates possess a diverse set of collective phenomena including metal-to-insulator transitions, magnetic phase transitions, and, upon chemical reduction, superconductivity. Here, we demonstrate epitaxial stabilization of layered nickelates in the Ruddlesden-Popper form, Nd$_{n+1}$Ni$_n$O$_{3n+1}$, using molecular beam epitaxy. By optimizing the stoichiometry of the parent perovskite NdNiO$_3$, we can reproducibly synthesize the $n = 1 - 5$ member compounds. X-ray absorption spectroscopy at the O $K$ and Ni $L$ edges indicate systematic changes in both the nickel-oxygen hybridization level and nominal nickel filling from 3$d^8$ to 3$d^7$ as we move across the series from $n = 1$ to $n = \infty$. The $n = 3 - 5$ compounds exhibit weakly hysteretic metal-to-insulator transitions with transition temperatures that depress with increasing order toward NdNiO$_3$ ($n = \infty)$.<br />Comment: 11 pages, 4 figures with Supplemental Information
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Materials 6, 055003 (2022)
- Publication Type :
- Report
- Accession number :
- edsarx.2205.09173
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevMaterials.6.055003