Asymmetric Skyrmion lattice in helimagnets

TL;DR

This paper predicts the existence of asymmetric Skyrmion lattices in helimagnets, challenging the conventional view of symmetric Skyrmion structures, and calls for experimental verification of these theoretical findings.

Contribution

It introduces the possibility of asymmetric Skyrmions in helimagnets, expanding the understanding of Skyrmion lattice configurations beyond symmetric structures.

Findings

Asymmetric Skyrmions can exist as perturbations of ferromagnetic solitons.

Hexagonal Skyrme crystals with higher charge may adopt asymmetric configurations.

Theoretical predictions suggest new stable Skyrmion lattice structures in helimagnets.

Abstract

Intricate spin textures in helimagnets, identified as stable topological Skyrmions, were observed experimentally, where Skyrme lattice was supposed to exhibit symmetric structures in the ground state. We show the possibility of asymmetric Skyrmions in a helimagnetic model, for individual Skyrmion as well as for the hexagonal Skyrme crystal with higher charge, as perturbative deformation and stabilization of exact ferromagnetic solitons. Such nonsymmetric configurations for the Skyrme lattice, predicted here theoretically, need to be verified in precision experiments.