Topological waveguide based on metamaterials of magnetic solitons

TL;DR

This paper proposes a topological waveguide using magnetic soliton metamaterials, demonstrating localized and selective magnetic excitation propagation based on topological properties, with potential applications in spintronics.

Contribution

It introduces a novel topological waveguide design based on magnetic soliton lattices, extending topological concepts to magnetic metamaterials for signal control.

Findings

Existence of mid-gap gyration modes at domain walls

Topological waveguide enables localized magnetic signal propagation

Potential for spintronic device applications

Abstract

We theoretically investigate coupled gyration modes of magnetic solitons whose distances to the nearest neighbors are staggered. In a one-dimensional bipartite lattice, analogous to the Su-Schrieffer-Heeger model, there is a mid-gap gyration mode bounded at the domain wall connecting topologically distinct two phases. As a technological application, we show that a one-dimensional domain-wall string in a two-dimensional soliton lattice can serve as a topological waveguide of magnetic excitations, which offers functionalities of a signal localization and a selective propagation of the frequency modes. Our result offers an alternative way to control of the magnetic excitation modes by using a magnetic metamaterial for future spintronic devices.