Wang X.G., Chotorlishvili L., Guo G.H., Berakdar J.

We study the propagation of surface spin waves in two waveguides coupled through the dipole-dipole interaction. Essential for the observations made here is the magnetoelectric coupling between the spin waves and the effective ferroelectric polarization. This allows an external electric field to act on the spin waves and to modify the band gaps of magnonic excitations in individual layers. By on-off switching of the electric field and/or varying its strength or direction with respect to the equilibrium magnetization, it is possible to permit or prevent the propagation of spin waves in a selected waveguide. We propose an experimentally feasible nanoscale device operating as a high-fidelity surface-wave magnonic gate.

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