Polarized inelastic neutron scattering of non-reciprocal spin waves in MnSi
arXiv:1906.00221 · doi:10.1103/PhysRevB.100.060404
Abstract
We report spin-polarized inelastic neutron scattering of the dynamical structure factor of the conical magnetic helix in the cubic chiral magnet MnSi. We find that the spectral weight of spin-flip scattering processes is concentrated on single branches for wavevector transfer parallel to the helix axis as inferred from well-defined peaks in the neutron spectra. In contrast, for wavevector transfers perpendicular to the helix the spectral weight is distributed among different branches of the magnon band structure as reflected in broader features of the spectra. Taking into account the effects of instrumental resolution, our experimental results are in excellent quantitative agreement with parameter-free theoretical predictions. Whereas the dispersion of the spin waves in MnSi appears to be approximately reciprocal at low energies and small applied fields, the associated spin-resolved spectral weight displays a pronounced non-reciprocity that implies a distinct non-reciprocal response in the limit of vanishing uniform magnetization at zero magnetic field.
arXiv comment6 pages, 5 figures. Added journal reference to published version
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Cited by in corpus (7)
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- Advanced Stationary and Non-Stationary Kernel Designs for Domain-Aware Gaussian Processes
- Magnetic molecular orbitals in MnSi
- Skyrmion-Excited Spin Wave Fractal Network
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