2024/09/04 by J. C. Bellizotti Souza, N. P. Vizarim, Souza, J. C. B. +7
Engineering · #Acoustic Wave Resonator Technologies #Adhesion, Friction, and Surface Interactions #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
paper · pdf · doi:10.48550/arxiv.2409.03056
openalex publication_date 2024/09/04 · openalex created_date 2024/10/19 · openalex updated_date 2026/07/28
We compare the dynamical behavior of magnetic skyrmions interacting with square and triangular defect arrays just above commensuration using both an atomistic model and a particle-based model. Under an applied drive, the initial motion is a kink traveling through the pinned skyrmion lattice. For the square defect array, both models agree well and show a regime in which the soliton motion is locked along 45^∘. The atomistic model also produces locking of a soliton along 30^∘, while the particle-based model does not. For the triangular defect array, the atomistic model exhibits soliton motion locked to 30^∘ over a wide region of external driving force values. In contrast, the particle-based model gives soliton motion locked to 45^∘ over only a small range of external driving force values. The difference arises because the nondeforming particle model facilitates meandering skyrmion orbits while the deformable atomistic model enables stronger skyrmion-skyrmion interactions that reduce the meandering. Our results indicate that soliton motion through pinned skyrmion lattices on a periodic substrate is a robust effect and could open the possibility of using solitons as information carriers. Our results also provide a better understanding of the regimes for which particle-based models of skyrmions are best suited.