Spin excitations in the skymion host Cu2OSeO3

Abstract

We have used inelastic neutron scattering to measure the magnetic excitation spectrum along the high-symmetry directions of the first Brillouin zone of the magnetic skyrmion hosting compound Cu${}_2$OSeO${}_3$. The majority of our scattering data are consistent with the expectations of a recently proposed model for the magnetic excitations in Cu${}_2$OSeO${}_3$, and we report best-fit parameters for the dominant exchange interactions. Important differences exist, however, between our experimental findings and the model expectations. These include the identification of two energy scales that likely arise due to neglected anisotropic interactions. This feature of our work suggests that anisotropy should be considered in future theoretical work aimed at the full microscopic understanding of the emergence of the skyrmion state in this material.

arXiv comment5 pages, 6 figures

References in corpus (19)

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• Skyrmion Lattice in a Doped Semiconductor
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• Band structure of helimagnons in MnSi resolved by inelastic neutron scattering
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• Exploration of the helimagnetic and skyrmion lattice phase diagram in Cu2OSeO3 using magnetoelectric susceptibility
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Cited by in corpus (17)

• Collective spin excitations of helices and magnetic skyrmions: review and perspectives of magnonics in non-centrosymmetric magnets
• Magnetic structure and excitation spectrum of the hyperhoneycomb Kitaev magnet $\beta$-Li${}_2$IrO${}_3$
• Helimagnon resonances in an intrinsic chiral magnonic crystal
• Magnonic Weyl states in Cu2OSeO3
• Magnetic hexamers interacting in layers in the (Na,K)${}_2$Cu${}_3$O(SO${}_4{)}_3$ minerals
• Measuring the Formation Energy Barrier of Skyrmions in Zinc Substituted Cu${}_2$OSeO${}_3$
• Signatures of a liquid-crystal transition in spin-wave excitations of skyrmions
• Low energy magnons in the chiral ferrimagnet ${\text{Cu}}_2{\text{OSeO}}_3$: a coarse-grained approach
• Low energy magnon dynamics and magneto-optics of the skyrmionic Mott insulator Cu${}_2$OSeO${}_3$
• Hierarchical excitations from correlated spin tetrahedra on the breathing pyrochlore lattice
• Site-specific electronic and magnetic excitations of the skyrmion material Cu${}_2$OSeO${}_3$
• Inelastic light scattering in the spin cluster Mott insulator Cu${}_2$OSeO${}_3$
• Coupled dynamics of long-range and internal spin cluster order in Cu${}_2$OSeO${}_3$
• Long-wavelength emergent phonons in skyrmion crystals distorted by exchange anisotropy and tilted magnetic fields
• Quintuplet condensation in the skyrmionic insulator Cu2OSeO3 at ultrahigh magnetic fields
• Lagrangian formulation for emergent elastic waves in magnetic emergent crystals
• Helical spin dynamics in Cu${}_2$OSeO${}_3$ as measured with small-angle neutron scattering