Interaction-induced nonlinear magnon transport in noncentrosymmetric ferromagnets
- Resource Type
- Working Paper
- Authors
- Fujiwara, Kosuke; Morimoto, Takahiro
- Source
- Subject
- Condensed Matter - Strongly Correlated Electrons
- Language
We study the effect of the magnon-magnon interaction on the nonlinear magnon transport. The magnon-magnon interaction induces nonreciprocal magnon decay when the time-reversal symmetry is broken, and leads to nonlinear thermal responses of magnons. We construct a theoretical framework to study the nonlinear thermal responses due to the nonreciprocal magnon decay by using the imaginary Dyson equation and quantum kinetic theory, which is then applied to a model of honeycomb ferromagnets with Dzyaloshinskii-Moriya interactions. An order estimate shows that the nonlinear thermal response from the present mechanism is feasible for experimental measurement.
Comment: 7 pages, 5 figures