Skyrmions as Compact, Robust and Energy-Efficient Interconnects for Domain Wall (DW)-based Systems

TL;DR

This paper proposes using skyrmions as energy-efficient, stable interconnects in domain wall-based systems, enabling data transmission with high compactness and robustness by leveraging their topological properties.

Contribution

Introducing a novel method to utilize skyrmions as interconnects in DW-based systems through reversible conversion with domain walls, enhancing energy efficiency and stability.

Findings

Skyrmions enable ultra-low depinning current for data transmission.

Reversible conversion between skyrmions and domain walls demonstrated.

Proposed technique improves energy efficiency and robustness of interconnects.

Abstract

Magnetic domain-wall (DW) has been widely investigated for future memory and computing systems. However, energy efficiency and stability become two major challenges of DW-based systems. In this letter, we first propose exploiting skyrmions as on-chip and inter-chip interconnects for DW-based systems, owing to the topological stability, small size and ultra-low depinning current density. In the proposed technique, data are processed in the form of DWs but are transmitted instead in the form of skyrmions. The reversible conversion between a skyrmion and a DW pair can be physically achieved by connecting a wide and a narrow magnetic nanowire. Our proposed technique can realize highly compact, robust and energy-efficient on-chip and inter-chip interconnects for DW-based systems, enabling the system to take advantages of both the DW and skyrmion.