Topological magnon band structure of emergent Landau levels in a skyrmion lattice

Abstract

The motion of a spin excitation across topologically non-trivial magnetic order exhibits a deflection that is analogous 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., bosonic collective spin excitations) in a lattice of skyrmion tubes in manganese silicide. For wave vectors perpendicular to the skyrmion tubes, the magnon spectra are consistent with the formation of finely spaced emergent Landau levels that are characteristic of the fictitious magnetic field used to account for the nontrivial topological winding of the skyrmion lattice. This provides evidence of a topological magnon band structure in reciprocal space, which is borne out of the nontrivial real-space topology of a magnetic order.

References in corpus (11)

• Mantid - Data Analysis and Visualization Package for Neutron Scattering and $\mu SR$ Experiments
• Observation of the Magnon Hall Effect
• Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3
• Thermally Driven Ratchet Motion of Skyrmion Microcrystal and Topological Magnon Hall Effect
• Fluctuation-induced first-order phase transition in Dzyaloshinskii-Moriya helimagnets
• Chirality induced anomalous-Hall effect in helical spin crystals
• Magnon dispersion shift in the induced-ferromagnetic phase of the noncentrosymmetric MnSi
• Weak crystallization of fluctuating skyrmion textures in MnSi
• The longitudinal neutron resonant spin echo spectrometer RESEDA
• MIEZE Neutron Spin-Echo Spectroscopy of Strongly Correlated Electron Systems
• Critical spin-flip scattering at the helimagnetic transition of MnSi

Cited by in corpus (26)

• Topological Phases in Magnonics
• Colloquium: Quantum Properties and Functionalities of Magnetic Skyrmions
• Stacking-dependent topological magnons in bilayer CrI${}_3$
• Quantum topological phase transitions in skyrmion crystals
• Active learning-assisted neutron spectroscopy with log-Gaussian processes
• Identifying, and constructing, complex magnon band topology
• Anisotropic skyrmion and multi-$q$ spin dynamics in centrosymmetric Gd${}_2$PdSi${}_3$
• Skyrmion-Excited Spin Wave Fractal Network
• Inertial spin waves in spin spirals
• Zero-frequency chiral magnonic edge states protected by non-equilibrium topology
• Riemann meets Goldstone: magnon scattering off quantum Hall skyrmion crystals probes interplay of symmetry breaking and topology
• Robustness of topological magnons in disordered arrays of skyrmions
• Eigenmodes of magnetic skyrmion lattices
• Dynamical susceptibility of Skyrmion crystal
• Short-wave magnons with multipole spin precession detected in the topological bands of a skyrmion lattice
• Momentum-space theory for topological magnons in 2D ferromagnetic skyrmion lattices
• Extending MIEZE spectroscopy towards thermal wavelengths
• Thermal Hall effect and gauge-field picture of magnons in antiferromagnetic skyrmion crystals
• Goldstone mode of Skyrmion Crystal
• Controlling Skyrmion Lattice Orientation with Local Magnetic Field Gradients
• Topological transition in spectrum of skyrmion crystal with uniaxial anisotropy
• Impact of the honeycomb spin-lattice on topological magnons and edge states in ferromagnetic 2D skyrmion crystals
• Transport of Dirac magnons driven by gauge fields
• Topological magnons in a non-coplanar magnetic order on the triangular lattice
• An indirect geometry crystal time-of-flight spectrometer for FRM II
• Magnon edge states of skyrmion crystal in non-uniform magnetic field