Bidirectional motion of antiferromagnetic skyrmions driven by competing spin torques

@misc{shen2026bidirectional,
  title = {{Bidirectional motion of antiferromagnetic skyrmions driven by competing spin torques}},
  author = {Laichuan Shen and Wang Kang and Xichao Zhang and Qiuping Huang and Yalin Lu and Zhifeng Zhu and Yan Zhou},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2606.18657},
  eprint = {2606.18657},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.18657},
}

TY  - UNPB
TI  - Bidirectional motion of antiferromagnetic skyrmions driven by competing spin torques
AU  - Laichuan Shen
AU  - Wang Kang
AU  - Xichao Zhang
AU  - Qiuping Huang
AU  - Yalin Lu
AU  - Zhifeng Zhu
AU  - Yan Zhou
PY  - 2026
DA  - 2026/10/27
PB  - arXiv
DO  - 10.48550/arxiv.2606.18657
UR  - https://arxiv.org/abs/2606.18657
AB  - Antiferromagnetic skyrmions are swirling topological spin textures with rich dynamics and intriguing transport properties, yet their bidirectional dynamics remain largely unexplored. Here, we investigate the dynamics of antiferromagnetic skyrmions driven by current-induced spin-transfer and spin-orbit torques. We computationally demonstrate that antiferromagnetic skyrmions moving in one direction at low current densities can reverse their motion direction when the driving current is above a threshold. Based on the Thiele approach analysis, we show that this bidirectional motion originates from a change in the relative strengths of two effective forces arising from spin-transfer and spin-orbit torques. Furthermore, exploiting this bidirectional motion on a single racetrack, we design programmable logic gates. Our results not only uncover a hidden mechanism for bidirectional skyrmion motion but also facilitate the development of antiferromagnet-based logic devices.
ER  -