ISIS Neutron and Muon Source Data Journal

E/T scaling for a possible ferromagnetic quantum critical point in Co3-xNixSn2S2

Abstract: A new magnetic Weyl semimetal was recently proposed in the layered half-metal Co3Sn2S2 with Kagomé lattice,whose Weyl points situate only 60 meV from the Fermi energy, resulting in a large anomalous Hall conductivity in the absence of a magnetic field. Co3Sn2S2 is a quasi-2D ferromagnet with a Curie temperature TC= 177 K and a magnetic moment at Co site along c-axis. By doping Ni into Co3Sn2S2, the ferromagnetism is systematically suppressed up to 20 % concentration, a nearly linear dependence of the resistivity are discovered in the normal state, suggesting a quantum critical point (QCP) while the Weyl nodes are more closer to the Fermi level. Here we propose to carry out inelastic neutron scattering experiments to reveal the possible FM QCP by investigating the E/T scaling and its temperature dependence of linewidth. We apply 6 days beamtime on the OSIRIS spectrometer.

Principal Investigator: Dr Hui-Qian Luo
Local Contact: Dr Franz Demmel
Experimenter: Miss Chang Liu
Experimenter: Dr Enke Liu
Experimenter: Dr Xiaoyan Ma

DOI: 10.5286/ISIS.E.RB1910198

ISIS Experiment Number: RB1910198

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 Hui-Qian Luo et al; (2019): E/T scaling for a possible ferromagnetic quantum critical point in Co3-xNixSn2S2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1910198

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