ISIS Neutron and Muon Source Data Journal

Investigation of Structural Phase Diagram and Superconductivity Mechanism in New Perovskite Antimonates

Abstract: We propose elastic neutron powder diffraction experiments on new perovskite antimonates (Ba,K)SbO3. Recently, we confirmed that heavily K doped antimonates become superconducting at Tc = 13 K. This superconductivity could primarily be understood by strong electron-phonon coupling of the material, which also gives rise to structural distortions and two distinct Sb-O bond lengths in un- and under-doped insulating compounds. By investigating the atomic structure and Sb-O bond length across the boundary of an insulator-to-superconductor transition, we can not only draw the complete structural phase diagram of these new antimonates, but also get an important clue to find their superconducting mechanism. These results will help understand the mechanism of high-Tc superconductivity in main-group oxide perovskites, and can be applied to a design principle of novel superconductors in the future.

Principal Investigator: Professor Hidenori Takagi
Experimenter: Dr Minu Kim
Local Contact: Dr Pascal Manuel
Experimenter: Dr Graham McNally

DOI: 10.5286/ISIS.E.RB1920682

ISIS Experiment Number: RB1920682

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; (2019): Investigation of Structural Phase Diagram and Superconductivity Mechanism in New Perovskite Antimonates, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1920682

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