Establishing the fundamental magnetic interactions in the chiral skyrmionic Mott insulator Cu2OSeO3 by terahertz electron spin resonance

Abstract

The recent discovery of skyrmions in Cu${}_2$OSeO${}_3$ has established a new platform to create and manipulate skyrmionic spin textures. We use high-field electron spin resonance (ESR) spectroscopy combining a terahertz free electron laser and pulsed magnetic fields up to 64 T to probe and quantify its microscopic spin-spin interactions. Besides providing direct access to the long-wavelength Goldstone mode, this technique probes also the high-energy part of the excitation spectrum which is inaccessible by standard low-frequency ESR. Fitting the behavior of the observed modes in magnetic field to a theoretical framework establishes experimentally that the fundamental magnetic building blocks of this skyrmionic magnet are rigid, highly entangled and weakly coupled tetrahedra.

arXiv comment5 pages, 3 Figures

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Cited by in corpus (23)

• Collective spin excitations of helices and magnetic skyrmions: review and perspectives of magnonics in non-centrosymmetric magnets
• The quantum origins of skyrmions and half-skyrmions in Cu2OSeO3
• Dynamical magnetoelectric phenomena of multiferroic skyrmions
• Theory of magnetic skyrmion glass
• Magnetic structure and excitation spectrum of the hyperhoneycomb Kitaev magnet $\beta$-Li${}_2$IrO${}_3$
• Magnon spectrum of the helimagnetic insulator Cu2OSeO3
• Ballistic magnon heat conduction and possible Poiseuille flow in the helimagnetic insulator Cu${}_2$OSeO${}_3$
• Entangled tetrahedron ground state and excitations of the magneto-electric skyrmion material Cu${}_2$OSeO${}_3$
• Magnonic Weyl states in Cu2OSeO3
• Magnetic hexamers interacting in layers in the (Na,K)${}_2$Cu${}_3$O(SO${}_4{)}_3$ minerals
• A tunable time-resolved spontaneous Raman spectroscopy setup for probing ultrafast collective excitation and quasiparticle dynamics in quantum materials
• ESR modes in a Strong-Leg Ladder in the Tomonaga-Luttinger Liquid Phase
• Spin excitations in the skymion host Cu2OSeO3
• Spin Wave Radiation by a Topological Charge Dipole
• Megahertz dynamics in skyrmion systems probed with muon-spin relaxation
• 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${}_3$
• 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${}_3$
• Coherent two-dimensional THz magnetic resonance spectroscopies for molecular magnets: Analysis of Dzyaloshinskii-Moriya interaction
• Coupled dynamics of long-range and internal spin cluster order in Cu${}_2$OSeO${}_3$
• Growth and helicity of non-centrosymmetric Cu${}_2$OSeO${}_3$ crystals
• Quintuplet condensation in the skyrmionic insulator Cu2OSeO3 at ultrahigh magnetic fields