Journal Article

IMPULSE-2022-00178

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Topological magnon band structure of emergent Landau levels in a skyrmion lattice

Weber, T. (Corresponding author)MLZ* ; Fobes, D. M. ; Waizner, J. ; Steffens, P. ; Tucker, G. S. ; Böhm, M. ; Beddrich, L.MLZ* ; Franz, C.MLZ* ; Gabold, H.MLZ* ; Bewley, R. ; Voneshen, D. ; Skoulatos, M.MLZ* ; Georgii, R.MLZ* ; Ehlers, G. ; Bauer, A.MLZ* ; Pfleiderer, C.MLZ* ; Böni, P.MLZ* ; Janoschek, M. ; Garst, M.

2022
Assoc. Washington, DC

Please use a persistent id in citations: doi:10.1126/science.abe4441

Abstract: The motion of a spin excitation across topologically nontrivial magnetic order exhibits a deflection that isanalogous to the effect of the Lorentz force on an electrically charged particle in an orbital magnetic field.We used polarized inelastic neutron scattering to investigate the propagation of magnons (i.e., bosoniccollective spin excitations) in a lattice of skyrmion tubes in manganese silicide. For wave vectors perpendicularto the skyrmion tubes, the magnon spectra are consistent with the formation of finely spaced emergent Landaulevels that are characteristic of the fictitious magnetic field used to account for the nontrivial topologicalwinding of the skyrmion lattice. This provides evidence of a topological magnon band structurein reciprocal space, which is borne out of the nontrivial real-space topology of a magnetic order.

Keyword(s): Information and Communication (1st) ; Magnetism (2nd) ; Condensed Matter Physics (2nd)

Note: ISSN 1095-9203 not unique: **3 hits**.

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Contributing Institute(s):

1. RESEDA (RESEDA)
2. MIRA (MIRA)

Experiment(s):

1. RESEDA: Resonance spin echo spectrometer (NL5S)
2. MIRA: Multipurpose instrument (NL6N)

Appears in the scientific report 2022

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