Topological magnon frequency combs
Phys. Rev. Applied 26, 044060 – Published 21 October, 2026
DOI: https://doi.org/10.1103/8q5b-3xcn
Abstract
Exploring the synergy between topological physics and nonlinear dynamics unveils profound insights into emergent states of matter. Inspired by recent experimental demonstrations of topological frequency combs in photonics, we theoretically introduce topological magnon frequency combs (MFCs) in a two-dimensional triangular skyrmion lattice. Computing the Chern numbers of magnon bands reveals robust chiral edge states. The nonlinear four-magnon scattering among the chiral edge modes generates the topological MFCs, activated by dual-frequency microwave driving without an amplitude threshold. The comb spacing is readily tunable through excitation frequency detuning. We finally show that the proposed topological MFCs are robust against disorder, bulk leakage, and thermal fluctuations, although strong nonlinearity exists. This work paves the way for defect-immune magnonic devices exploiting MFCs and sparks investigations into topological-nonlinear phenomena in magnetic systems.
