  Magnetic skyrmions have been in the spotlight since their observation in
technologically relevant systems at room temperature. More recently, there has
been increasing interest in additional quasiparticles that may exist as
stable/metastable spin textures in magnets, such as the skyrmionium and the
anti-skyrmionite (i.e., a double-antiskyrmion-skyrmion pair) that have distinct
topological characteristics. The next challenge and opportunity, at the same
time, is to investigate the use of multiple magnetic quasiparticles as
information carriers in a single device for next generation nanocomputing. In
this paper, we propose a spintronic interconnect device where multiple
sequences of information signals are encoded and transmitted simultaneously by
skyrmions, skyrmioniums, and anti-skyrmionites. The proposed spintronic
interconnect device can be pipelined via voltage-controlled-magnetic-anisotropy
(VCMA) gated synchronisers that behave as intermediate registers. We
demonstrate theoretically that the interconnect throughput and transmission
energy can be effectively tuned by the VCMA gate voltage and appropriate
electric current pulses. By carefully adjusting the device structure
characteristics, our spintronic interconnect device exhibits comparable energy
efficiency with copper interconnects in mainstream CMOS technologies. This
study provides fresh insight into the possibilities of skyrmionic devices in
future spintronic applications.
