Can Boolean Algebra Pave the Highway Towards Effective Spin Wave Logic Circuit Implementation?
In recent years, Spin Waves (SWs) have emerged as a promising avenue for beyond-CMOS computing, offering potential advantages in terms of energy efficiency, scalability, and opening avenues towards novel computation paradigms. Until now, SW interference-based gates, for example, the 3-input majority (MAJ3) gate, have been proposed and experimentally demonstrated, and an alternative computing paradigm, which relies on SW phase manipulation instead of SW interference has been proposed. However, state-of-the-art SW-based devices suffer from challenges that hinder the realization of larger-scale SW circuits. In this presentation, we explore a different computing avenue that relies on Boolean algebra and introduce a SW Switch that makes use of the Voltage Controlled Magnetic Anisotropy (VCMA) effect to allow/block SW propagation. We introduce the device concept, verify its functionality by means of micromagnetic simulations, and perform a circuit-level analysis on EPFL Combinational Benchmarking Suite circuits. We implement them by means of the proposed method and state-of-the-art SW and CMOS technologies, and our results indicate that the novel approch can potentially outperform state-of-the-the SW and CMOS counterparts. We finally highlight system level advantages of our proposal and conclude that SW Boolean switching gates are opening the most promising avenue towards energy effective SW computing.