ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Elucidating the origin of Dirac magnon gap in CoTiO3
Abstract: Honeycomb cobaltates have attracted significant recent attention for potential realizations of bond-dependent interactions beyond the conventional XXZ model. One prominent candidate is CoTiO3, an XY honeycomb magnet with a simple A-type antiferromagnetic order. Although the presence of non-trivial exchange interactions in this material has been unambiguously shown by the existence of a Dirac magnon gap at the K point of the Brillouin zone, the precise form of such interaction is still unclear. The only explanation proposed so far, which relies on a shift of the Dirac cone generated by bond-dependent interactions, was conclusively ruled out in our recent study. We have proposed an alternative explanation based on a small out-of-plane canting of the ordered moment, which could gap out the Dirac point based on conventional mechanisms such as DM interaction. To test such a mechanism, we propose to carry out cold-neutron time-of-flight measurement at LET to study the field-dependence of Dirac gap under an out-of-plane field. Such a field directly modifies the out-of-plane canting of the ordered moment and should increase the Dirac gap based on the above mechanism. The outcome of our experiment will provide important constraint on the form of exchange anisotropy in this topical material and shed light on the form of bond-dependent exchange in other honeycomb cobaltates.
Principal Investigator: Dr Bo Yuan
Experimenter: Mr Daniel Dobrowolski
Experimenter: Professor James Patrick Ian Clancy
Experimenter: Dr Travis Williams
Local Contact: Dr David Voneshen
Local Contact: Dr Ross Stewart
DOI: 10.5286/ISIS.E.RB2467106
ISIS Experiment Number: RB2467106
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2467106-1 | LET | 17 March 2029 | Download |
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 Bo Yuan et al; (2026): Elucidating the origin of Dirac magnon gap in CoTiO3, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2467106
Data is released under the CC-BY-4.0 license.
