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Updated: Mar 15, 2026
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Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
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Interaction-Driven Altermagnetic Magnon Chiral Splitting
Zhejunyu Jin1, Zhaozhuo Zeng1, Jie Liu1
1University of Electronic Science and Technology of China, School of Physics and State Key Laboratory of Electronic Thin Films and Integrated Devices, Chengdu 610054, China.
Physical Review Letters
|March 13, 2026
Summary
Nonlinear three-wave mixing enables relativistic magnon chiral splitting in altermagnets. This novel bosonic mechanism, observed in bilayer antiferromagnets, offers new avenues for magnonic devices.
Area of Science:
- Condensed Matter Physics
- Spintronics
- Quantum Magnetism
Background:
- Nonrelativistic magnon chiral splitting in altermagnets is a recent area of interest.
- Understanding relativistic effects on magnons is crucial for advanced magnetic systems.
Purpose of the Study:
- To demonstrate nonlinear three-wave mixing extending magnon chiral splitting into relativistic regimes.
- To identify symmetry-dictated classes of chiral splitting in altermagnets.
Main Methods:
- Theoretical investigation using a bilayer antiferromagnet model.
- Analysis of nonlinear three-wave mixing processes involving magnons.
- Symmetry analysis (C4T, σvT) of chiral splitting phenomena.
Main Results:
- Identified three distinct classes of relativistic chiral splitting governed by specific symmetries.
- Demonstrated a novel bosonic mechanism for symmetry-protected chiral splitting.
- Magnons' ability to violate particle-number conservation is key to this phenomenon.
Conclusions:
- Nonlinear three-wave mixing provides a pathway to engineer relativistic altermagnetic splitting.
- Findings open possibilities for advanced magnonic devices.
- Offers deeper insights into magnon dynamics in complex magnetic materials.
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