Visualization of Moiré Magnons in Monolayer Ferromagnet
Ganguli, S. C., Aapro, M., Kezilebieke, S., Amini, M., Lado, J. L., & Liljeroth, P. (2023). Visualization of Moiré Magnons in Monolayer Ferromagnet. Nano Letters, 23(8), Article 3412-3417. https://doi.org/10.1021/acs.nanolett.3c00417
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Nano LettersAuthors
Date
2023Copyright
© 2023 the Authors
Two-dimensional magnetic materials provide an ideal platform to explore collective many-body excitations associated with spin fluctuations. In particular, it should be feasible to explore, manipulate, and ultimately design magnonic excitations in two-dimensional van der Waals magnets in a controllable way. Here we demonstrate the emergence of moiré magnon excitations, stemming from the interplay of spin-excitations in monolayer CrBr3 and the moiré pattern arising from the lattice mismatch with the underlying substrate. The existence of moiré magnons is further confirmed via inelastic quasiparticle interference, showing the appearance of a dispersion pattern correlated with the moiré length scale. Our results provide a direct visualization in real-space of the dispersion of moiré magnons, demonstrating the versatility of moiré patterns in creating emergent many-body excitations.
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American Chemical Society (ACS)ISSN Search the Publication Forum
1530-6984Keywords
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https://converis.jyu.fi/converis/portal/detail/Publication/182740572
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This research made use of the Aalto Nanomicroscopy Center (Aalto NMC) facilities and was supported by the European Research Council (ERC-2017-AdG no. 788185 “Artificial Designer Materials”) and Academy of Finland (Academy professor funding nos. 318995 and 320555, Academy research fellow nos. 331342 and 336243), and the Jane and Aatos Erkko Foundation.License
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