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Updated: Sep 26, 2025
08:01
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
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Topological magnon modes on honeycomb lattice with coupling textures
Hong Huang1,2, Toshikaze Kariyado1, Xiao Hu3,4
1International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba 305-0044, Japan.
Scientific Reports
|April 16, 2022
Summary
Researchers propose a new method for creating topological magnon modes using only nearest-neighbor interactions on a honeycomb lattice. This discovery could lead to more robust information propagation technologies.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
Background:
- Topological magnon modes offer potential for robust information propagation due to their immunity to scattering and disorder.
- Existing theoretical and experimental efforts are advancing the field, but new insights are needed.
Purpose of the Study:
- To propose a novel and simplified scheme for achieving topological magnon modes.
- To investigate the role of nearest-neighbor exchange couplings in inducing topological states.
Main Methods:
- Utilizing a honeycomb lattice model with tunable nearest-neighbor exchange couplings.
- Analyzing band structures to identify band inversion between p-orbital and d-orbital like magnon modes.
- Investigating the behavior of topological magnon modes at domain interfaces.
Main Results:
- A new scheme for topological magnons is proposed using only nearest-neighbor exchange couplings.
- Tuning exchange couplings in ferromagnets and antiferromagnets induces topological states via band inversion.
- Topological magnon modes exhibit counterpropagating currents at domain interfaces, mimicking spin-momentum locking.
Conclusions:
- The proposed scheme offers a simpler route to realize topological magnon modes.
- The findings provide complementary insights into topological phenomena in magnetic systems.
- This work paves the way for developing advanced information propagation technologies.
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