Reconfigurable Magnonic Logic via Coherent Spin-Wave Interference in Artificial Domain-Wall Waveguides

Through micromagnetic simulations, this study demonstrates that when a spin wave propagates in an artificial magnonic domain wall waveguide, it can induce a spin wave in an adjacent magnonic waveguide via coherent coupling. By leveraging the interference between these two spin waves, magnonic logic devices — specifically, OR and XOR gates — are successfully realized. The logical states of "1" and "0" are achieved via coherent constructive and destructive interference, respectively, by controlling the phase and amplitude of the input wave sources. Furthermore, the relationship between the output amplitude and the phase difference of the input sources is thoroughly investigated, revealing that the logic functionality can be modulated by adjusting the phase difference. In contrast to traditional current-driven logic, this research offers a pathway to design low-power and highly integrated magnonics logic devices without requiring the complex physical modifications inherent in conventional circuits.