Moiré-driven skyrmion family

Area of Science:

• Topological physics
• Condensed matter physics
• Wave phenomena

Background:

• Skyrmions, merons, and skyrmioniums are topological textures observed in various physical systems.
• Achieving coexistence and controlled transformation of these diverse skyrmion family members on a single platform is a significant challenge.

Purpose of the Study:

• To propose and experimentally demonstrate a novel bilayer twisted moiré elastic system.
• To enable the generation and control of multiple skyrmion family members with varying topological charges.
• To establish a framework for understanding topological invariant evolution and texture transitions.

Main Methods:

• Fabrication of a bilayer twisted moiré elastic system.
• Construction of three-dimensional displacement vector fields to model topological evolution.
• Manipulation of Lamb-wave phase to control texture transport.

Main Results:

• Successful generation of multiple skyrmion family members (skyrmions, merons, skyrmioniums) within the moiré system.
• Demonstration of controlled transitions and stable coexistence of different topological textures.
• Observation of phason-like dynamics in the quasiperiodic structure via manipulated Lamb-wave phase.

Conclusions:

• The developed moiré elastic system offers a versatile platform for controlling topological textures.
• The findings provide a new route for designing integrated topological wave devices.
• This work advances the understanding of topological texture dynamics in controllable systems.