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2 results on '"Constance, Toulouse"'

1. Crossover between distinct symmetries in solid solutions of rare earth nickelates

Author

Jennifer Fowlie, Bernat Mundet, Constance Toulouse, Alexander Schober, Mael Guennou, Claribel Domínguez, Marta Gibert, Duncan T. L. Alexander, Jens Kreisel, and Jean-Marc Triscone

Subjects
Biotechnology, TP248.13-248.65, Physics, QC1-999
Abstract

A strong coupling of the lattice to functional properties is observed in many transition metal oxide systems, such as the ABO3 perovskites. In the quest for tailor-made materials, it is essential to be able to control the structural properties of the compound(s) of interest. Here, thin film solid solutions that combine NdNiO3 and LaNiO3, two materials with the perovskite structure but distinct space groups, are analyzed. Raman spectroscopy and scanning transmission electron microscopy are combined in a synergistic approach to fully determine the mechanism of the structural crossover with chemical composition. It is found that the symmetry transition is achieved by phase coexistence in a way that depends on the substrate selected. These results carry implications for analog-tuning of physical properties in future functional materials based on these compounds.

Published
2021
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2. Crossover between distinct symmetries in solid solutions of rare earth nickelates

Author

Duncan T. L. Alexander, Alexander Schober, Jennifer Fowlie, Constance Toulouse, Mael Guennou, Bernat Mundet, C. Dominguez, Jean-Marc Triscone, Jens Kreisel, Marta Gibert, University of Zurich, and Fowlie, Jennifer

Subjects
Materials science, 530 Physics, QC1-999, Crossover, Oxide, perovskites, Physics [G04] [Physical, chemical, mathematical & earth Sciences], 02 engineering and technology, ddc:500.2, 10192 Physics Institute, 01 natural sciences, chemistry.chemical_compound, symbols.namesake, Phase (matter), 0103 physical sciences, Scanning transmission electron microscopy, General Materials Science, metal-insulator, Thin film, phase, 010306 general physics, Physics, General Engineering, Space group, tool, 021001 nanoscience & nanotechnology, 2500 General Materials Science, rnio3 r, chemistry, Physique [G04] [Physique, chimie, mathématiques & sciences de la terre], Chemical physics, charge disproportionation, symbols, 2200 General Engineering, films, 0210 nano-technology, Raman spectroscopy, transitions, TP248.13-248.65, Solid solution, Biotechnology
Abstract

A strong coupling of the lattice to functional properties is observed in many transition metal oxide systems, such as the ABO(3) perovskites. In the quest for tailor-made materials, it is essential to be able to control the structural properties of the compound(s) of interest. Here, thin film solid solutions that combine NdNiO3 and LaNiO3, two materials with the perovskite structure but distinct space groups, are analyzed. Raman spectroscopy and scanning transmission electron microscopy are combined in a synergistic approach to fully determine the mechanism of the structural crossover with chemical composition. It is found that the symmetry transition is achieved by phase coexistence in a way that depends on the substrate selected. These results carry implications for analog-tuning of physical properties in future functional materials based on these compounds.

Published
2021

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