Magnon driven skyrmion dynamics in antiferromagnets: The effect of magnon polarization

Abstract

The controllable magnetic skyrmion motion represents a highly concerned issue in preparing advanced skyrmion-based spintronic devices. Specifically, magnon-driven skyrmion motion can be easily accessible in both metallic and insulating magnets, and thus is highly preferred over electric current control further for the ultra-low energy consumption. In this work, we investigate extensively the dynamics of skyrmion motion driven by magnon in an antiferromagnet using the collective coordinate theory, focusing on the effect of magnon polarization. It is revealed that the skyrmion Hall motion driven by circularly polarized magnon becomes inevitable generally, consistent with earlier report. Furthermore, the elastic scattering theory and numerical results unveil the strong inter-dependence between the linearly polarized magnon and skyrmion motion, suggesting the complicated dependence of the skyrmion motion on the polarization nature of driving magnon. On the reversal, the scattering from the moving skyrmion may lead to decomposition of the linearly polarized magnon into two elliptically polarized magnon bands. Consequently, a net transverse force acting on skyrmion is generated owing to the broken mirror symmetry, which in turn drives a skyrmion Hall motion. The Hall motion can be completely suppressed only in some specific condition where the mirror symmetry is preserved. The present work unveils non-trivial skyrmion-magnon scattering behavior in antiferromagnets, advancing the antiferromagnetic spintronics and benefiting to high-performance devices.

22 pages,7 figures

References in corpus (13)

• Theory of current-driven motion of Skyrmions and spirals in helical magnets
• Microscopic approach to current-driven domain wall dynamics
• Magnon-skyrmion scattering in chiral magnets
• Fractional antiferromagnetic skyrmion lattice induced by anisotropic couplings
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Propulsion of a domain wall in an antiferromagnet by magnons
• Antiferromagnetic Domain Wall as Spin Wave Polarizer and Retarder
• Current-Induced Helicity Reversal of a Single Skyrmionic Bubble Chain in a Nanostructured Frustrated Magnet
• Topological spin Hall effects and tunable skyrmion Hall effects in uniaxial antiferromagnetic insulators
• Dynamics of antiferromagnetic skyrmion in absence and presence of pinning defect
• Dynamics of magnon fluid in Dzyaloshinskii-Moriya magnet and its manifestation in magnon-Skyrmion scattering
• Modelling spin waves in noncollinear antiferromagnets: spin-flop states, spin spirals, skyrmions and antiskyrmions
• Ultrafast depinning of domain wall in notched antiferromagnetic nanostructures

Cited by in corpus (8)

• Optical-controlled ultrafast dynamics of skyrmion in antiferromagnets
• Handedness-filter and Doppler shift of spin waves in ferrimagnetic domain walls
• Spin-wave-driven skyrmion dynamics in ferrimagnets: Effect of net angular momentum
• Dynamics of hybrid magnetic skyrmion driven by spin-orbit torque in ferrimagnets
• Controllable magnon frequency comb in synthetic ferrimagnets
• Thermal squeezing and nonlinear spectral shift of magnons in antiferromagnetic insulators
• Magnon-driven dynamics of frustrated skyrmion in synthetic antiferromagnets: Effect of skyrmion precession
• Anatomy of spin wave driven magnetic texture motion via magnonic torques