Work

Pump-induced magnon anticrossing due to three-magnon splitting and confluence

Year: 2025

Type: article

Abstract: We present a plausible mechanism for achieving a magnon-magnon level repulsion spectrum originating from the oscillation between the splitting and confluence in a three-magnon scattering process. When a magnetostatic mode on a YIG sphere is pumped by a microwave signal near the magnon resonance frequency with an increasing amplitude, the generated magnon condensate at half of the pumping frequency exerts a backaction to the original magnon mode. Such a strong nonlinear coupling manifests a striking feature of a ``bending effect'' of the magnetostatic mode spectra, akin to the anticrossing observed in a strongly coupled magnon-photon system.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.111.l180410

Authors: Tao Qu, Yuzan Xiong, Xufeng Zhang, Yi Li, Wei Zhang

Institutions: University of North Carolina at Chapel Hill, Northeastern University, Argonne National Laboratory

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Materials Sciences and Engineering Division, National Science Foundation, Office of Science, Office of Naval Research

Awards: Harnessing Magnonic Nonreciprocity Through Dissipation Engineering, HYBRID-MAGNON QUANTUM DEVICES, G8371563404, CAREER: Quantum Spintronic Device Building Blocks with Magnetically Ordered Materials