Unveiling the structure and the role of hydrogen content in rare-earth infinite-layer nickelates
Rare-earth nickelates have recently been discovered as a new family of superconductors. With an infinite-layer crystal structure and electronic configuration of Ni1+ reminiscent of Cu2+ in cuprates, they have become a very active field of research today. We have prepared several nickelate compositions, both in their oxidised RNiO3 and infinite-layer RNiO2 forms by the citrate-nitrate route, yielding high-purity samples. To date, superconductivity has only been observed in thin films, but not in the bulk material. Some reports suggest that the crystalline quality, including the exact stoichiometry of the oxygen, may be determinant in the occurrence or not of superconductivity. Another recent hypothesis has to do with the effect of hydrogen trapped in the infinite-layer structure, which would be crucial for the presence of superconductivity. In this proposal we intend to investigate both, being necessary the use of neutrons to study both the oxygen stoichiometry and the presence of hydrogen owing to its negative scattering density.
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The recommended format for citing this dataset in a research publication is in the following format:
GAINZA MARTIN Javier; ALONSO Jose Antonio; FERNANDEZ DIAZ Maria Teresa; N. M. Nemes and SANTOS SILVA JR Romualdo. (2024). Unveiling the structure and the role of hydrogen content in rare-earth infinite-layer nickelates. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-23-810
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