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Lattice-commensurate skyrmion texture in a centrosymmetric breathing kagome magnet

Abstract

Skyrmion lattices (SkL) in centrosymmetric materials typically have a magnetic period on the nanometer-scale, so that the coupling between magnetic superstructures and the underlying crystal lattice cannot be neglected. We reveal the commensurate locking of a SkL to the atomic lattice in Gd3Ru4Al12 via high-resolution resonant elastic x-ray scattering (REXS). Weak easy-plane magnetic anisotropy, demonstrated here by a combination of ferromagnetic resonance and REXS, penalizes placing a skyrmion core on a site of the atomic lattice. Under these conditions, a commensurate SkL, locked to the crystal lattice, is stable at finite temperatures – but gives way to a competing incommensurate ground state upon cooling.Wediscuss the role of Umklapp-terms in theHamiltonian for the formation of this lattice-locked state, its magnetic space group, and the role of slight discommensurations, or (line) defects in the magnetic texture. We also contrast our findings with the case of SkLs in noncentrosymmetric material platforms.

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Authors (18)

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
npj Quantum Materials no. 9,
ISSN: 2397-4648
Language:
English
Publication year:
2024
Bibliographic description:
Hirschberger M., Szigeti B. G., Hemmida M., Hirschmann M. M., Esser S., Ohsumi H., Tanaka Y., Spitz L., Gao S., Kolincio K., Sagayama H., Nakao H., Yamasaki Y., Forró L., Krug von Nidda H., Kezsmarki I., Arima T., Tokura Y.: Lattice-commensurate skyrmion texture in a centrosymmetric breathing kagome magnet// npj Quantum Materials -Vol. 9, (2024), s.45-1-45-8
DOI:
Digital Object Identifier (open in new tab) 10.1038/s41535-024-00654-2
Sources of funding:
  • Free publication
Verified by:
Gdańsk University of Technology

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