THz Magneto-electric atomic rotations in the chiral compound Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$

Laura Chaix, Sophie De Brion, Florence Levy-Bertrand +9

We have determined the terahertz spectrum of the chiral langasite Ba${}_3$NbFe${}_3$Si${}_2$O${}_{14}$ by means of synchrotron-radiation measurements. Two excitations are revealed that are…