ISIS Neutron and Muon Source Data Journal

Unravelling the Interplay between Octahedral Distortions and High-Tc Superconductivity in Perovskite Bismuthates

Abstract: We propose elastic neutron powder diffraction experiments on perovkite bismuthates (Ca,K)BiO3. Known as one of the earliest high-Tc oxide superconductors, bismuthates have provided a model system for studying novel superconductivity intertwined with a lattice structure. Recently, we have synthesized (Ca,K)BiO3 for the first time, and found that superconducting Tc was remarkably decreased (~8 K) compared to the sister compounds (Ba,K)BiO3 (34 K) and (Sr,K)BiO3 (13 K). High-resolution diffraction experiments at HRPD will enable us to precisely determine the crystal structure of (Ca,K)BiO3, in which large octahedral tilt distortions are expected due to the smaller Ca ions. Our results will be useful to understand the origin of superconductivity and its link to structural distortions among the bismuthate families, and can be applied to a design principle for new oxide superconductors.

Principal Investigator: Professor Hidenori Takagi
Experimenter: Dr Minu Kim
Experimenter: Dr Masahiko Isobe
Local Contact: Dr Alexandra Gibbs
Experimenter: Dr MARCO POLO JIMENEZ SEGURA

DOI: 10.5286/ISIS.E.RB1720394

ISIS Experiment Number: RB1720394

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Hidenori Takagi et al; (2018): Unravelling the Interplay between Octahedral Distortions and High-Tc Superconductivity in Perovskite Bismuthates, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1720394

Data is released under the CC-BY-4.0 license.