Skyrmion-Based Ultra-Low Power Electric-Field-Controlled Reconfigurable (SUPER) Logic Gate

Compared with skyrmions in ferromagnetic (FM) materials, skyrmions in near-compensated ferrimagnetic (FIM) materials demonstrate higher motion velocity and negligible skyrmion Hall (Sky-Hall) angle. This provides a brighter prospect of skyrmions for computing applications. In this letter, we propose an FIM skyrmion-based ultra-low power electric-field-controlled reconfigurable (SUPER) logic gate. By leveraging electric-field-controlled magnetic anisotropy (EFCMA) effect and skyrmion-skyrmion (Sky-Sky) interaction, varied logic functions, such as AND, OR, XOR, NOT, etc., can be realized. Moreover, artificial fishtail-shaped hollows are introduced for implementing skyrmion divisions. Micromagnetic simulations have been performed to validate the logic operations and divisions. By combining these mechanisms, an ultra-low power parallel computing scheme based on FIM skyrmions is proposed, in which multiple logic operations of two inputs can be carried out in parallel. The influence of the number of logic operations on energy consumption improvement has been investigated.