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.


Quantum dynamics in a J_eff=1/2 isotropic triangular-lattice antiferromagnet in applied field

Abstract: This proposal is part of our research programme to explore the spin dynamics of strongly-frustrated quantum magnets. A canonical model is the spin-1/2 triangular antiferromagnet for which theoretical predictions for quantum dynamics effects leading to roton-like soft minima in the dispersion relation and extended scattering continua remain experimentally unexplored. In recent single-crystal measurements on LET we found that Ba3CoSb2O9 is a unique realization of such as system with i) strong renormalization of the spin-wave dispersion relation and zone-boundary soft modes ii) unexpectedly strong continuum scattering at intermediate to high energies. Here we propose to measure the magnetic field and temperature dependence of the dispersions and continuum scattering to compare with theories of quantum dynamics and distinguish between two-magnon and two-spinon continuum scattering.

Principal Investigator: Professor Radu Coldea
Local Contact: Dr Rob Bewley
Experimenter: Miss Stephanie Williams
Experimenter: Mr David Macdougal

DOI: 10.5286/ISIS.E.RB1610390

ISIS Experiment Number: RB1610390

Part DOI Instrument Public release date Download Link
10.5286/ISIS.E.79113147 LET 13 May 2019 Download

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
Select the data format above to find out more about it.

Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Radu Coldea et al; (2016): Quantum dynamics in a J_eff=1/2 isotropic triangular-lattice antiferromagnet in applied field , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1610390

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



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