ISIS Neutron and Muon Source Data Journal

PDF study of the structural disorder in a quantum spin liquid candidate

Abstract: We have identified a potential quantum spin liquid by tuning the magnetic interactions on a square lattice through d10-d0 cation mixing. MuSR shows dynamic magnetism down to 0.25 K in Sr2Cu(Te0.5W0.5)O6, and a strong T-linear dependence to the low temperature specific heat. Frustrated magnetism on the square lattice is described by the J1-J2 spin-1/2 Heisenberg square lattice model, where the region at J2/J1~0.5 is currently under debate. However no experimental evidence of a compound with J2/J1~0.5 had been found previously. In Sr2Cu(Te0.5W0.5)O6 structural disorder and magnetic frustration are inherently linked with each Cu square containing either Te6+ or W6+ promoting either a dominant J1 or J2 interaction. On triangular lattices it has been proposed that a disorder-induced gapless QSL state is possible. We therefore wish to use PDF to study the local structure of Sr2Cu(Te0.5W0.5)O6.

Principal Investigator: Dr Helen Walker
Experimenter: Mr Philip Welch
Experimenter: Dr Joe Paddison
Local Contact: Dr Helen Playford
Experimenter: Professor Maarit Karppinen
Experimenter: Dr Otto Mustonen
Experimenter: Mr Sami Vasala

DOI: 10.5286/ISIS.E.RB1810107

ISIS Experiment Number: RB1810107

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 Helen Walker et al; (2018): PDF study of the structural disorder in a quantum spin liquid candidate, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810107

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