2025/05/24 by Zhejunyu Jin, Tianci Gong, Jin, Zhejunyu +10 · 1 citation
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Geomagnetism and Paleomagnetism Studies #Materials Science (cond-mat.mtrl-sci) #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.2505.18496
openalex publication_date 2025/05/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Altermagnets recently are identified as a new class of magnets that break the time-reversal symmetry without exhibiting net magnetization. The role of the dipole-dipole interaction (DDI) on their dynamical properties however is yet to be addressed. In this work, we show that the DDI can induce the strong coupling between exchange magnons with opposite chiralities in altermagnets, manifesting as a significant level repulsion in the magnon spectrum. Crucially, the predicted magnon-magnon coupling is highly anisotropic, and observable in practical experiments. These exotic features are absent in conventional antiferromagnets. Our findings open a new pathway for quantum magnonic information processing based on altermagnetism.