ISIS Neutron and Muon Source Data Journal

Local structure in the hidden order phase of URu2Si2

Abstract: URu2Si2 is one of the most actively studied materials exhibiting unconventional behaviour due to electronic correlations. The mystery of this compound is the nature of the so-called `hidden order' state, which sets in below 17.5 K. This transition is characterised by an enormous change in entropy (~0.2R ln2). A small `parasitic' antiferromagnetic order sets in in the HO phase, but its ordered moment is far too small to explain the change in entropy. The nature of the order parameter is still uncertain, despite intensive theoretical and experimental efforts. Some studies have observed a distortion of the tetragonal lattice in the hidden order phase, but the effect is highly sample dependent, whereas other signatures of hidden order are not. We propose to use PDF analysis to study the local structure in URu2Si2 to see if there might be a hidden lattice distortion as well as hidden order

Principal Investigator: Dr Russell Ewings
Experimenter: Professor David Keen
Experimenter: Dr Helen Walker
Local Contact: Dr Ronald Smith

DOI: 10.5286/ISIS.E.RB2010246

ISIS Experiment Number: RB2010246

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 Russell Ewings et al; (2020): Local structure in the hidden order phase of URu2Si2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2010246

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