# Current-induced shuttlecock-like movement of non-axisymmetric chiral skyrmions

## TL;DR

This study uses micromagnetic simulations to explore how non-axisymmetric chiral skyrmions move under current in polar helimagnets, revealing a shuttlecock-like motion influenced by their asymmetric structure and tilt angle.

## Contribution

It introduces the first detailed analysis of current-induced dynamics of non-axisymmetric skyrmions, highlighting their unique shuttlecock-like movement and the role of topological charge distribution.

## Key findings

- Skyrmions exhibit a two-stage motion: rotation then translation.
- Asymmetry causes different velocities in skyrmion parts, leading to shuttlecock-like movement.
- Transverse velocity depends on the tilt angle of the surrounding phase.

## Abstract

Current-induced motion of non-axisymmetric skyrmions within angular phases of polar helimagnetis with the easy plane anisotropy is studied by micromagnetic simulations.Such non-axisymmetric skyrmions consist of a circular core and a crescent-shaped domain-wall region formed with respect to the tilted surrounding state. A current-driven motion of non-axisymmetric skyrmions exhibits two distinct time regimes: initially the skyrmions rotate towards the current flow direction and subsequently move along the current with the skyrmionic crescent first. According to the Thiele equation, the asymmetric distribution of the topological charge and the dissipative force tensor play an important role for giving the different velocities for the circular and the crescent-shaped constituent parts of the skyrmion what underlies such a shuttlecock-like movement. Moreover, the current-velocity relation depends on the tilt angle of the surrounding angular phase what makes in particular the transverse velocity of skyrmions sensitive to their field-driven configurational transformation.