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Fermi-surface origin of skyrmion lattices in centrosymmetric rare-earth intermetallics
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Bouaziz, Juba, Mendive-Tapia, Eduardo, Bluegel, Stefan and Staunton, Julie B. (2022) Fermi-surface origin of skyrmion lattices in centrosymmetric rare-earth intermetallics. Physical Review Letters, 128 . 157206. doi:10.1103/PhysRevLett.128.157206 ISSN 0031-9007.
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Official URL: https://doi.org/10.1103/PhysRevLett.128.157206
Abstract
We show from first principles that barrel-shaped structures within the Fermi surface of the centrosymmetric intermetallic compounds GdRu2Si2 and Gd2PdSi3 give rise to Fermi surface nesting, which determines the strength and sign of quasi-two-dimensional Ruderman-Kittel-Kasuya-Yosida pairwise exchange interactions between the Gd moments. This is the principal mechanism leading to their helical single-q spin-spiral ground states, providing transition temperatures and magnetic periods in good agreement with experiment. Using atomistic spin-dynamic simulations, we draw a direct line between the subtleties of the three-dimensional Fermi surface topology and the stabilization of a square skyrmion lattice in GdRu2Si2 at applied magnetic fields as observed in experiment.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Journal or Publication Title: | Physical Review Letters | ||||||||
Publisher: | American Physical Society | ||||||||
ISSN: | 0031-9007 | ||||||||
Official Date: | 15 April 2022 | ||||||||
Dates: |
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Volume: | 128 | ||||||||
Article Number: | 157206 | ||||||||
DOI: | 10.1103/PhysRevLett.128.157206 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Copyright Holders: | © 2022 American Physical Society | ||||||||
Date of first compliant deposit: | 14 April 2022 | ||||||||
Date of first compliant Open Access: | 16 May 2022 | ||||||||
Open Access Version: |
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