DOI > 10.5291/ILL-DATA.4-01-1630

This proposal is publicly available since 09/28/2026

Title

Spin Wave Dispersion in Magnetic Weyl Semimetal Candidate Co3Sn2S2

Abstract

Co3Sn2S2 has a highly frustrated kagome lattice structure and is one of several magnetic Weyl semimetal candidates. Recent transport studies have observed large anomalous Hall effect, magnetoresistance, and chiral anomalies consistent with the presence of Weyl fermions, suggesting the presence of topological phenomena. To fully understand the magnetism in Co3Sn2S2, we propose an inelastic neutron scattering experiment to study the spin wave dispersion and determine if there is a spin gap at the Dirac points. Additionally, we will determine if the system can be described well by a Heisenberg Hamiltonian or if additional interactions will be needed to understand the behavior. Our observations will provide new understanding of the mechanisms causing exotic topological phenomena and cast light on potential applications in novel spintronic devices.

Experimental Report

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Data Citation

The recommended format for citing this dataset in a research publication is in the following format:

NEUBAUER Kelly; Bourges; HANSEN Ursula Bengaard; IVANOV Alexandre; KLEMM Mason; STEFFENS Paul; Yixi Su and XIE Yaofeng. (2021). Spin Wave Dispersion in Magnetic Weyl Semimetal Candidate Co3Sn2S2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1630

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Metadata

Experiment Parameters

  • Environment temperature

    10-180 K
  • Experiment energy

    2-10 meV
  • Experiment moment

    5-7 Å-1
  • Experiment res energy

    1.5 meV
  • Experiment res moment

    ~1 Å-1

Sample Parameters

  • Formula

    • Co3Sn2S2