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.
Phonons and disorder in Yb2Ti2O7
Abstract: The pyrochlores provide an excellent model system for studying the interaction of framework vibrational modes, defects and magnetism. We propose to investigate these couplings with a comparative study of phonons in non-magnetic Y2Ti2O7 and La2Zr2O7 (for which we already have data) and the frustrated magnet Yb2Ti2O7, for which we request experimental time on MERLIN. The results will be compared directly with our calculations using density-functional theory, which are challenging due to the presence of large, disordered magnetic moments. By comparing our results with mass substitutions we can assess the extent of electron-phonon interaction, and potentially explain why the oxygen vacancies in Y2Ti2O7 and Yb2Ti2O7 are different. We shall also assess whether static displacements recently reported for Yb2Ti2O7 are really dynamic.
Principal Investigator: Professor Jon Goff
Experimenter: Dr Keith Refson
Experimenter: Mr Tim Lehner
Experimenter: Dr Dharmalingan Prabhakaran
Local Contact: Dr David Voneshen
DOI: 10.5286/ISIS.E.RB1910192
ISIS Experiment Number: RB1910192
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB1910192-1 | MERLIN | 24 June 2022 | Download |
| 10.5286/ISIS.E.RB1910192-2 | ALF | 19 June 2022 | 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:
Professor Jon Goff et al; (2019): Phonons and disorder in Yb2Ti2O7, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910192
Data is released under the CC-BY-4.0 license.
