Moire-driven skyrmion family

TL;DR

This paper introduces a bilayer twisted moire elastic system as a versatile platform for generating and controlling various skyrmion family members with different topological charges, enabling their coexistence and transformation within a single system.

Contribution

It demonstrates the use of a twisted moire elastic system to observe and control multiple skyrmion types and their dynamics, a novel approach in topological wave physics.

Findings

Twist angle controls skyrmion evolution and coexistence.

Experimental evidence of skyrmion transformation and stability.

Observation of phason-like dynamics in quasiperiodic structures.

Abstract

Skyrmion family members, such as skyrmions, bimerons, and skyrmioniums, have been recently observed in quantum, solid-state, water, and magnetic systems. However, it remains challenging and crucial to identify a single platform for observing their coexistence and evolution. Here, we describe a bilayer twisted moire elastic system as a controllable platform for the generation of skyrmion family members with distinct topological charges across different wave systems. Our experimental results further reveal that the twist angle induces a synergistic evolution between lattice symmetry and topological characteristics, enabling the mutual transformation and stable coexistence of different skyrmion family members within a single system. More importantly, we demonstrate that such a platform supports the discontinuous transport of Lamb-wave-induced topological textures, revealing phason-like dynamics within the quasiperiodic structure. This work opens a new avenue for designing all-in-one topological wave devices.