Magnonics along the wall in Bimeron Chain Domain Walls

TL;DR

This paper shows that bimeron chain domain walls in 2D systems can support topologically protected magnonic edge states, which are stable against disorder and useful for nanoscale information devices.

Contribution

It introduces a new magnonic medium based on bimeron chain domain walls with topologically protected edge modes, supported by analytical and simulation evidence.

Findings

Magnonic excitations are supported along bimeron chain domain walls.

Edge states are topologically protected and resilient to disorder.

Domain walls and their edge modes are stable, promising for device applications.

Abstract

We demonstrate that domain walls built from bimeron chains (bc-DW) in two-dimensional systems constitute a spontaneously assembled medium that holds magnonic excitations along its direction. We prove that such magnons are topological, leading to protected edge states. We also verify the stability of the domain walls and its edge modes' resilience against disorder. Analytical calculations and micromagnetic simulations support our findings. The robustness of these edge modes holds promise for potential applications in the design of nanoscale magnonic devices for information storage and transport.