ISIS Neutron and Muon Source Data Journal

Effect of electron doping on the magnetic dynamics of the d^4 Mott insulator Ca2RuO4

Abstract: Oxides containing heavy transition-metal ions with four d electrons (d^4) surrounded by an octahedron of oxygen ions have recently been predicted to display a novel type of magnetic order called excitonic magnetism. The conditions required for this state are that the atomic spin-orbit coupling is comparable in strength to the magnetic coupling between neighbouring ions. A recent theoretical study predicted that excitonic magnetism can be found in Ca2RuO4, and that as a result the inter-site interactions are strongly modified by electron doping. We aim to investigate this prediction by comparing the spin dynamics of Ca2RuO4 with that of compounds doped with 5% of La and Pr. The spectrum of spin excitations is sensitive to the sign and magnitude of the inter-site coupling and also to the strength of the spin-orbit coupling, so by identifying changes in these we will test the predictions.

Principal Investigator: Professor Andrew Boothroyd
Experimenter: Dr Henrik Jacobsen
Local Contact: Dr Duc Le
Experimenter: Dr Robin Perry
Experimenter: Miss Sara Ricco
Local Contact: Dr Russell Ewings
Experimenter: Dr Wiktor Bodnar
Experimenter: Dr Kerstin Witte
Experimenter: Dr Sandra Peglow
Experimenter: Mr Jan Wallis
Experimenter: Dr Angela Kruth
Experimenter: Mr Davide Pincini

DOI: 10.5286/ISIS.E.RB1710113

ISIS Experiment Number: RB1710113

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 Andrew Boothroyd et al; (2017): Effect of electron doping on the magnetic dynamics of the d^4 Mott insulator Ca2RuO4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1710113

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