Realizing Quantitative Quasiparticle Modeling of Skyrmion Dynamics in Arbitrary Potentials

TL;DR

This paper develops a comprehensive quantitative model for magnetic skyrmion dynamics in arbitrary potentials, enabling large-scale simulations and detailed analysis of diffusion and forces at ultra-low current densities.

Contribution

It introduces a method to calibrate skyrmion models with experimental parameters, allowing for accurate large-scale simulations and force quantification in complex potential landscapes.

Findings

Successful simulation of skyrmion diffusion in arbitrary potentials.

Quantitative determination of forces at ultra-low current densities.

Calibration of model parameters to match experimental time and length scales.

Abstract

We demonstrate fully quantitative Thiele model simulations of magnetic skyrmion dynamics on previously unattainable experimentally relevant large length and time scales by ascertaining the key missing parameters needed to calibrate the experimental and simulation time scales and current-induced forces. Our work allows us to determine complete spatial pinning energy landscapes that enable quantification of experimental studies of diffusion in arbitrary potentials within the Lifson-Jackson framework. Our method enables us to ascertain the time scales, and by isolating the effect of ultra-low current density (order $10^6 A/m^2$) generated torques we directly infer the total force acting on the skyrmion for a quantitative modelling.