6533b7cffe1ef96bd125906f
RESEARCH PRODUCT
Mechanism for ultrafast electric-field driven skyrmion nucleation
Juba BouazizSamir LounisSamir LounisP. M. BuhlB. DupéB. DupéSebastian MeyerLouise DesplatP.-a. Hervieuxsubject
Materials scienceCondensed matter physicsField (physics)SkyrmionNucleationPhysics::Optics02 engineering and technologyPhysik (inkl. Astronomie)021001 nanoscience & nanotechnology7. Clean energy01 natural sciencesCondensed Matter::Materials ScienceAmplitudeFerromagnetismElectric field0103 physical sciencesAntiferromagnetismddc:530Condensed Matter::Strongly Correlated Electrons010306 general physics0210 nano-technologyUltrashort pulsedescription
We show how a Dzyaloshinskii-Moriya interaction can be generated in an ultrathin metal film from a femtosecond pulse in electric field. This interaction does not require structural inversion-symmetry breaking, and its amplitude can be tuned depending on the amplitude of the field. We perform first-principles calculations to estimate the strength of the field-induced magnetoelectric coupling for ferromagnetic Fe, Co, and Ni, and antiferromagnetic Mn, as well as FePt and MnPt alloys. Last, using atomistic simulations, we demonstrate how an isolated antiferromagnetic skyrmion can be coherently nucleated from the collinear background by an ultrashort pulse in electric field on a hundred-femtosecond timescale.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-08-23 | Physical Review B |