Interaction-Driven Altermagnetic Magnon Chiral Splitting
Abstract
Nonrelativistic magnon chiral splitting in altermagnets has garnered significant recent attention. In this Letter, we demonstrate that nonlinear three-wave mixing-where magnons split or coalesce-extends this phenomenon into unprecedented relativistic regimes. Employing a bilayer antiferromagnet with Dzyaloshinskii-Moriya interactions, we identify three distinct classes of chiral splitting, each dictated by specific symmetries, such as C_{4}T, σ_{v}T, or their combination. This reveals a novel bosonic mechanism for symmetry-protected chiral splitting, capitalizing on the unique ability of magnons to violate particle-number conservation, a feature absent in low-energy fermionic systems. Our findings pave the way for engineering altermagnetic splitting, with potential applications in advanced magnonic devices and deeper insights into magnon dynamics in complex magnetic systems.
Fields of Study & Subjects
Magnetic properties of thin films
Chemical and Physical Properties of Materials
Topological Materials and Phenomena
Publication details
- Journal / source
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Volume
- 136
- Issue
- 8
- Pages
- 086703–086703
- Publication date
- 26 January 2026
- Language
- EN