  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.
