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arXiv · 1909.10722

Topological waveguide based on metamaterials of magnetic solitons

Gyungchoon Go·Ik-Sun Hong·Seo-Won Lee·Se Kwon Kim·Kyung-Jin Lee
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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.

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Gyungchoon Go, Ik-Sun Hong, Seo-Won Lee, Se Kwon Kim, Kyung-Jin Lee. 2019-09-24. Topological waveguide based on metamaterials of magnetic solitons. https://doi.org/10.1103/physrevb.101.134423

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