Abstract
We theoretically investigate coupled gyration modes of magnetic solitons whose distances to the nearest neighbors are staggered. In a one-dimensional bipartite lattice, we analytically and numerically find that there is a midgap gyration mode bounded at the domain wall connecting topologically distinct two phases which is analogous to the Su-Schrieffer-Heeger model. As a technological application, we show that a one-dimensional domain-wall string in a two-dimensional soliton lattice can serve as a waveguide of magnetic excitations, which offers functionalities of a signal localization and selective propagation of the frequency modes. Our result offers an alternative way to control the magnetic excitation modes by using a magnetic metamaterial for future spintronic devices.
| Original language | English |
|---|---|
| Article number | 134423 |
| Journal | Physical Review B |
| Volume | 101 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 2020 Apr 1 |
Bibliographical note
Funding Information:G.G. was supported by the National Research Foundation of Korea (NRF) (Grant No. NRF-2019R1I1A1A01063594). S.K.K. was supported by a Young Investigator Grant (YIG) from Korean-American Scientists and Engineers Association (KSEA) and Research Council Grant No. URC-19-090 of the University of Missouri. K.-J.L. acknowledges support by the NRF (Grant No. NRF-2020R1A2C3013302).
Publisher Copyright:
© 2020 American Physical Society.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics