Relativistic domain-wall dynamics in van der Waals antiferromagnet MnPS3

Ignacio M. Alliati, Richard F.L. Evans, Kostya S. Novoselov, Elton J.G. Santos*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The discovery of two-dimensional (2D) magnetic van der Waals (vdW) materials has flourished an endeavor for fundamental problems as well as potential applications in computing, sensing and storage technologies. Of particular interest are antiferromagnets, which due to their intrinsic exchange coupling show several advantages in relation to ferromagnets such as robustness against external magnetic perturbations. Here we show that, despite of this cornerstone, the magnetic domains of recently discovered 2D vdW MnPS3 antiferromagnet can be controlled via magnetic fields and electric currents. We achieve ultrafast domain-wall dynamics with velocities up to ~3000 m s−1 within a relativistic kinematic. Lorentz contraction and emission of spin-waves in the terahertz gap are observed with dependence on the edge termination of the layers. Our results indicate that the implementation of 2D antiferromagnets in real applications can be further controlled through edge engineering which sets functional characteristics for ultrathin device platforms with relativistic features.

Original languageEnglish
Article number3
Journalnpj Computational Materials
Issue number1
Publication statusPublished - 13 Jan 2022

Bibliographical note

Funding Information:
R.F.L.E. gratefully acknowledges the financial support of ARCHER UK National Supercomputing Service via the embedded CSE programme (ecse1307). K.S.N. thanks the Ministry of Education (Singapore) through the Research Center of Excellence program (grant EDUN C-33-18-279-V12, I-FIM) for funding support. E.J.G.S. acknowledges computational resources through CIRRUS Tier-2 HPC Service (ec131 Cirrus Project) at EPCC funded by the University of Edinburgh and EPSRC (EP/P020267/1); ARCHER UK National Supercomputing Service ( via Project d429. E.J.G.S. acknowledges the EPSRC Early Career Fellowship (EP/T021578/1) and the University of Edinburgh for funding support.

Publisher Copyright:
© 2022, The Author(s).

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