ISIS Neutron and Muon Source Data Journal

Dispersion of E8 particles in the spin-1/2 antiferromagnetic XXZ chain BaCo2V2O8 in a transverse magnetic field

Abstract: The one-dimensional spin-1/2 antiferromagnetic with Heisenberg-Ising (XXZ) anisotropy is a great model system to explore fundamental physics concepts. In zero applied magnetic field, it hosts spinon excitations which are confined into pairs by interchain coupling and in a longitudinal magnetic field it enters a critical regime known as a Tomonaga-Luttinger Liquid characterised by Bethe string excitations. These features have been explored using the compounds BaCo2V2O8 and SrCo2V2O8. In BaCo2V2O8 a transverse magnetic field has also been found to also suppress the antiferromagnetic order and induce a one-dimensional quantum critical point classified by the exceptional E8 Lie algebra which is characterized by 8 gapped excitations (massive particles). Here we propose to explore the dispersion of the E8 particles in BaCo2V2O8 and make comparison to recent theories.

Principal Investigator: Dr Alysia Lake
Experimenter: Mr Konrad Puzniak
Local Contact: Dr Christian Balz
Experimenter: Dr Jie Ma

DOI: 10.5286/ISIS.E.RB2210086

ISIS Experiment Number: RB2210086

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 Alysia Lake et al; (2022): Dispersion of E8 particles in the spin-1/2 antiferromagnetic XXZ chain BaCo2V2O8 in a transverse magnetic field, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2210086

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