Phase diagram of compressively strained nickelate thin films
- Yale University
- ORNL
- Brookhaven National Laboratory (BNL)
The complex phase diagrams of strongly correlated oxides arise from the coupling between physical and electronic structure. This can lead to a renormalization of the phase boundaries when considering thin films rather than bulk crystals due to reduced dimensionality and epitaxial strain. The well-established bulk RNiO3 phase diagram shows a systematic dependence between the metal-insulator transition and the perovskite A-site rare-earth ion, R. Here, we explore the equivalent phase diagram for nickelate thin films under compressive epitaxial strain. We determine the metalinsulator phase diagram for the solid solution of Nd1-yLayNiO3 thin films within the range 0 y 1. We find qualitative similarity between the films and their bulk analogs, but with an overall renormalization in the metal-insulator transition to lower temperature. A combination of x-ray diffraction measurements and soft x-ray absorption spectroscopy indicates that the renormalization is due to increased Ni O bond hybridization for coherently strained thin films.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- ORNL work for others
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1110967
- Journal Information:
- APL Materials, Journal Name: APL Materials Journal Issue: 3 Vol. 1; ISSN 2166-532X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electronic transitions in strained SmNiO{sub 3} thin films
Strain stabilized metal{endash}insulator transition in epitaxial thin films of metallic oxide CaRuO{sub 3}