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Local Dzyaloshinskii-Moriya Interactions Driving Quasi-2D Magnetism in a Centrosymmetric Nanoskyrmion Material

S. H. Moody1,2,3,*, P. J. Bereciartua4, S. Francoual4, M. T. Littlehales2,5, M. N. Wilson2,6, M. Gomilšek2,7,8, M. T. Birch9, D. A. Mayoh10, G. Balakrishnan10 et al.

P. D. Hatton2

  • *Contact author: samuel.moody@psi.ch
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Phys. Rev. Lett. 135, 076706 – Published 14 August, 2025

DOI: https://doi.org/10.1103/td2c-dxgj

Abstract

The unabating discovery of nanoskyrmions in centrosymmetric magnets challenges the conventional Dzyaloshinskii-Moriya (DM) skyrmion stabilization mechanism. We investigate Gd2PdSi3 using polarized resonant x-ray scattering and find that the low-field incommensurate modulations are elliptical helices, evolving into spin-density waves at higher fields. Quasi-2D magnetism arises via local DM interactions generated by inversion symmetry breaking around Gd-Gd bonds, which we characterize using atomistic simulations. Our findings suggest a prominent “hidden” role of DM interactions even in centrosymmetric skyrmionic hosts.

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Phys. Rev. Lett. 135, 076706– Published 14 August, 2025
  • Received 3 February 2025
  • Accepted 9 July 2025
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