Weyl-mediated helical magnetism in NdAlSi.
Journal
Nature materials
ISSN: 1476-4660
Titre abrégé: Nat Mater
Pays: England
ID NLM: 101155473
Informations de publication
Date de publication:
Dec 2021
Dec 2021
Historique:
received:
23
12
2020
accepted:
23
06
2021
pubmed:
21
8
2021
medline:
21
8
2021
entrez:
20
8
2021
Statut:
ppublish
Résumé
Emergent relativistic quasiparticles in Weyl semimetals are the source of exotic electronic properties such as surface Fermi arcs, the anomalous Hall effect and negative magnetoresistance, all observed in real materials. Whereas these phenomena highlight the effect of Weyl fermions on the electronic transport properties, less is known about what collective phenomena they may support. Here, we report a Weyl semimetal, NdAlSi, that offers an example. Using neutron diffraction, we found a long-wavelength helical magnetic order in NdAlSi, the periodicity of which is linked to the nesting vector between two topologically non-trivial Fermi pockets, which we characterize using density functional theory and quantum oscillation measurements. We further show the chiral transverse component of the spin structure is promoted by bond-oriented Dzyaloshinskii-Moriya interactions associated with Weyl exchange processes. Our work provides a rare example of Weyl fermions driving collective magnetism.
Identifiants
pubmed: 34413490
doi: 10.1038/s41563-021-01062-8
pii: 10.1038/s41563-021-01062-8
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1650-1656Subventions
Organisme : Gordon and Betty Moore Foundation (Gordon E. and Betty I. Moore Foundation)
ID : GBMF9456
Organisme : National Science Foundation (NSF)
ID : DMR-1708929.
Organisme : National Science Foundation (NSF)
ID : DMR-1508249
Organisme : National Science Foundation (NSF)
ID : DMR-1644779
Commentaires et corrections
Type : CommentIn
Informations de copyright
© 2021. The Author(s), under exclusive licence to Springer Nature Limited.
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