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.
Magnetic Phase Transition in a Highly Disordered Cuprate Near the Percolation Threshold
Abstract: We propose to investigate the magnetic phase transitions in the highly disordered cuprate LiCu?O?. This frustrated spin-1/2 square-lattice Heisenberg antiferromagnet features two types of edge-sharing CuO planes, where magnetic CuČ? ions are randomly substituted by non-magnetic Li? ions at 20% and 40% concentrations, respectively. The moderately diluted planes (20%) undergo long-range antiferromagnetic order below Tc1 ? 124 K, while the highly diluted planes (40%) reside near the classical percolation threshold (pc ? 0.41) and exhibit a second, yet poorly understood, magnetic transition below Tc2 ? 30 K. This unique material offers a rare opportunity to study magnetic ordering phenomena in a regime dominated by strong disorder and frustration. Our primary goal is to elucidate the nature of the magnetic phase emerging near the percolation threshold, using elastic and inelastic neutron scattering techniques. These measurements will allow us to determine both the static spin structure and the low-energy excitations of this disordered antiferromagnet, shedding light on criticality, spin correlations, and dynamic properties in the vicinity of percolation-driven quantum phase transitions. Understanding such systems is crucial for developing a comprehensive framework of disordered magnetism and may have broader implications for quantum materials where randomness and interactions compete on equal footing.
Principal Investigator: Professor Simon Moser
Local Contact: Dr Pascal Manuel
Experimenter: Dr Andreas Kreyssig
DOI: 10.5286/ISIS.E.RB2520339
ISIS Experiment Number: RB2520339
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2520339-1 | WISH | 16 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:
Professor Simon Moser et al; (2026): Magnetic Phase Transition in a Highly Disordered Cuprate Near the Percolation Threshold, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520339
Data is released under the CC-BY-4.0 license.
