Magnon-plasmon hybridization mediated by Dzyaloshinskii-Moriya interaction in two-dimensional crystals: tuning with electric field

Abstract: Recently, a mechanism of magnon-plasmon hybridization in ferromagnetic and antiferromagnetic systems, based on spin-orbit interaction associated with mobile (conduction) electrons has been proposed. Here, we consider another mechanism of magnon-plasmon hybridization, which is based on spin-orbit coupling attributed to localized spins and leading to the antisymmetric exchange (Dzyaloshinskii-Moriya) interaction. The basic element of the mechanism of magnon-plasmon coupling relies on the modification of the Dzialoshinskii-Moriya interaction by the electric field associated with plasmons. We show, that the modification of the Dzialoshinskii-Moriya components due to electric field accompanied by plasmons may lead to hybridization of magnons and plasmons. Moreover, we also show that an external electric field normal to the layer (due to a gate voltage, for instance) can be used as a tool to tune the strength of the magnon-plasmon coupling.