Antiferromagnetic Domain Wall Motion Driven by Spin-Orbit Torques

Takayuki Shiino, Se Hyeok Oh, Paul M. Haney, Seo Won Lee, Gyungchoon Go, Byong Guk Park, Kyoung Jin Lee

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

We theoretically investigate the dynamics of antiferromagnetic domain walls driven by spin-orbit torques in antiferromagnet-heavy-metal bilayers. We show that spin-orbit torques drive antiferromagnetic domain walls much faster than ferromagnetic domain walls. As the domain wall velocity approaches the maximum spin-wave group velocity, the domain wall undergoes Lorentz contraction and emits spin waves in the terahertz frequency range. The interplay between spin-orbit torques and the relativistic dynamics of antiferromagnetic domain walls leads to the efficient manipulation of antiferromagnetic spin textures and paves the way for the generation of high frequency signals from antiferromagnets.

Original languageEnglish
Article number087203
JournalPhysical Review Letters
Volume117
Issue number8
DOIs
Publication statusPublished - 2016 Aug 16

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Shiino, T., Oh, S. H., Haney, P. M., Lee, S. W., Go, G., Park, B. G., & Lee, K. J. (2016). Antiferromagnetic Domain Wall Motion Driven by Spin-Orbit Torques. Physical Review Letters, 117(8), [087203]. https://doi.org/10.1103/PhysRevLett.117.087203