Electromagnon softening in a Kagome lattice at

The magnetoelectric interactions that induce electric polarization in magnets can also couple oscillations of magnetization to polar lattice vibrations. The oscillations of polarization at magnon frequency and vice versa give rise to dynamic magnetoelectric effects, such as mixed spin-phonon excitations (electromagnons). The best systems to look for them are frustrated magnets, where competing interactions and the geometry of the spin lattice favor unconventional magnetic states. We study the spectrum electromagnons close to the magnetoelectric-multiferroic instability in the Heisenberg antiferromagnet on the Kagome lattice.