Model for twin electromagnons and magnetically induced oscillatory polarization in multiferroic RMnO${}_3$

Markku P. V. Stenberg, Rogerio de Sousa

We propose a model for the pair of electromagnon excitations observed in the class of multiferroic materials {\it R}MnO${}_3$ ({\it R} is a rare-earth ion). The model is based on a h…