ISIS Neutron and Muon Source Data Journal

Exploring the metal-insulator transition in Ca2RuO4

Abstract: Ca2RuO4 is a fascinating compound, where strong electronic correlations give rise to many unique features. Just above room temperature (~360 K) the system is metallic, below the system is an insulating state accompanied with orbital ordering. A small voltage applied at room temperature induces a current maintained metallic state. We recently found that by limiting the applied current it is possible to suppress the orbital and the magnetic ordering before completing the transition to the metallic state. This electronic phenomenon is probably associated to subtle changes in the arrangement of the oxygen octahedra surrounding the Ru ions, as their arrangement is directly related to the Mottness of the system. We propose to use the high sensitivity of SXD to the oxygen displacement to map the behaviour of the octahedra in this low current-voltage region.

Principal Investigator: Dr Alessandro Bombardi
Experimenter: Dr Rosalba Fittipaldi
Experimenter: Dr Matthias Gutmann
Local Contact: Dr Silvia Capelli
Experimenter: Dr Dan Porter
Experimenter: Dr Veronica Granata
Experimenter: Dr Antonio Vecchione

DOI: 10.5286/ISIS.E.RB1810603

ISIS Experiment Number: RB1810603

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:
Dr Alessandro Bombardi et al; (2018): Exploring the metal-insulator transition in Ca2RuO4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810603

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