6533b7dcfe1ef96bd12716c7
RESEARCH PRODUCT
Relativistic Neel-order fields induced by electrical current in antiferromagnets
J. ŽEleznýKarel VýbornýJoerg WunderlichHuawei GaoAurelien ManchonJairo SinovaTomas JungwirthJan ZemenJ. Mašeksubject
PhysicsCondensed Matter - Materials ScienceCondensed matter physicsPoint reflectionGeneral Physics and AstronomyNon-equilibrium thermodynamicsMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesTransport theory3. Good healthElectrical currentFerromagnetismQuantum mechanicsAntiferromagnetismCondensed Matter::Strongly Correlated ElectronsUltrashort pulsedescription
We predict that a lateral electrical current in antiferromagnets can induce non-equilibrium N\'eel order fields, i.e. fields whose sign alternates between the spin sublattices, which can trigger ultra-fast spin-axis reorientation. Based on microscopic transport theory calculations we identify staggered current-induced fields analogous to the intra-band and to the intrinsic inter-band spin-orbit fields previously reported in ferromagnets with a broken inversion-symmetry crystal. To illustrate their rich physics and utility, we considered bulk Mn2Au with the two spin sublattices forming inversion partners, and a 2D square-lattice antiferromagnet with broken structural inversion symmetry modelled by a Rashba spin-orbit coupling. We propose an AFM memory device with electrical writing and reading.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-10-30 |