Noncollinear antiferromagnetic textures driven high-harmonic generation from magnetic dynamics in the absence of spin-orbit coupling

Ousmane Ly

Research output: Contribution to journalArticlepeer-review


We demonstrate the generation of high order harmonics in carrier pumping from precessing ferromagnetic or antiferromagnetic orders, excited via magnetic resonance, in the presence of topological antiferromagnetic textures. This results in an enhancement of the carrier dynamics by orders of magnitude, enabling for an emission deep in the THz frequency range. Interestingly, the generation process occurs in an intrinsic manner, and is solely governed by the interplay between the s-d exchange coupling underlying the noncollinear antiferromagnetic order and the dynamical s-d exchange constant of the magnetic drive. Therefore, the relativistic spin-orbit interaction is not required for the emergence of high harmonics in the pumped currents. Accordingly, the noncollinear topological antiferromagnetic order is presented as an alternative to spin-orbit interaction for the purpose of harnessing high harmonic emission in carrier pumping. Furthermore, we demonstrate the emergence of high harmonics from random magnetic defects. This suggests the universality of the magnetically induced high harmonic emission in the presence of real and/or momentum space noncollinear textures. Our proposal initiates a tantalizing prospect for the utilization of topological textures in the context of the highly active domains of ultrafast spintronics and THz emission.
Original languageEnglish (US)
JournalJournal of Physics: Condensed Matter
StatePublished - Jan 20 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-01-23
Acknowledgements: This work was supported by King Abdullah University of Science and Technology (KAUST). We acknowledge computing resources on the supercomputer SHAHEEN granted by the KAUST Supercomputing Lab. We thank A. Manchon and A. Abbout for useful discussions.

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics


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