Magnetic skyrmions are topological quasiparticles whose non-volatility, detectability, and mobility make them exciting candidates for low-energy computing. Previous works have demonstrated the feasibility and efficiency of current-driven skyrmions in cascaded logic structures inspired by reversible computing. As skyrmions can be propelled through the voltage-controlled magnetic anisotropy (VCMA) effect with much greater efficiency, this work proposes a VCMA-based skyrmion propagation mechanism that drastically reduces energy dissipation. Additionally, we demonstrate the functionality of skyrmion logic gates enabled by our novel voltage-based propagation and estimate its energy efficiency relative to other logic schemes. The minimum dissipation of this VCMA-driven magnetic skyrmion logic at 0 K is found to be ∼6× the room-temperature Landauer limit, indicating the potential for sub-Landauer dissipation through further engineering.
@article{arxiv.2301.10700,
title = {Near-Landauer Reversible Skyrmion Logic with Voltage-Based Propagation},
author = {Benjamin W. Walker and Alexander J. Edwards and Xuan Hu and Michael P. Frank and Felipe Garcia-Sanchez and Joseph S. Friedman},
journal= {arXiv preprint arXiv:2301.10700},
year = {2023}
}