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arXiv · 2506.11527

Magnon-magnon interaction induced by nonlinear spin wave dynamics

Matteo Arfini·Alvaro Bermejillo-Seco·Artem Bondarenko·Clinton A. Potts·Yaroslav M. Blanter·Herre S. J. van der Zant·Gary A. Steele
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Abstract

We experimentally and theoretically demonstrate that nonlinear spin-wave dynamics can induce an effective resonant interaction between non-resonant magnon modes in a yttrium iron garnet disk. Under strong pumping near the ferromagnetic resonance mode, we observe a spectral splitting that emerges with increasing drive amplitude. This phenomenon is well captured by a theoretical framework based on the linearization of a magnon three-wave mixing Hamiltonian, which at high power leads to parametric Suhl instabilities. The access and control of nonlinear magnon-parametric processes enables the development of experimental platforms in an unexplored parameter regime for both classical and quantum computation protocols.

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Matteo Arfini, Alvaro Bermejillo-Seco, Artem Bondarenko, Clinton A. Potts, Yaroslav M. Blanter, Herre S. J. van der Zant, Gary A. Steele. 2025-06-13. Magnon-magnon interaction induced by nonlinear spin wave dynamics. https://doi.org/10.1103/jnpb-2mxx

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