Dresden 2017 – wissenschaftliches Programm
MA 53.5: Hauptvortrag
Donnerstag, 23. März 2017, 17:15–17:45, HSZ 01
Nonreciprocal propagation of elementary excitations in noncentrosymmetric magnets — •Yoshinori Onose — University of Tokyo, Tokyo, Japan
Simultaneous breaking of spatial inversion and time-reversal symmetries completely lifts the degeneracy between +k and -k states of elementary excitations in solids. In this case, the decay rate and phase velocity depends on the sign of k, and, hence, the propagation of the elementary excitation becomes nonreciprocal. The photonic nonreciprocity, which is denoted as magnetochiral or optical magentoelectric effect, has been investigated extensively in the last two decades. Here, we experimentally study the nonreciprocal propagation of magnons and acoustic waves as well as microwaves in noncentrosymmetric magnets.