ISIS Neutron and Muon Source Data Journal

Spin excitations in the candidate Weyl semimetal EuCuAs

Abstract: Very recently, EuCuAs was proposed as an example of a topological semimetal. Our measurements on Wish show that the Eu magnetic structure is incommensurate with a propagation vector q = (0, 0, 4.1). This was unexpected, as ab inito calculations had predicted a collinear antferromagnetic order. It is a very interesting discovery because it means that the conduction states experience a time-reversal-symmetry-breaking interaction, which could create a pair of Weyl points in the electronic band structure. We propose to measure the powder-averaged magnon spectrum on Merlin. The objective is to determine the dominant in-plane exchange interaction, which is needed to develop a spin Hamiltonian to understand the magnetic behaviour.

Principal Investigator: Professor Andrew Boothroyd
Experimenter: Dr Jian Rui Soh
Experimenter: Mr jinzhao sun [Deactivated]
Local Contact: Dr Helen Walker
Experimenter: Dr Dharmalingan Prabhakaran

DOI: 10.5286/ISIS.E.RB1920514

ISIS Experiment Number: RB1920514

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 Andrew Boothroyd et al; (2019): Spin excitations in the candidate Weyl semimetal EuCuAs, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1920514

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