6533b7d5fe1ef96bd1263f60
RESEARCH PRODUCT
Large surface magnetization in noncentrosymmetric antiferromagnets
Mike A. LundKjetil M. D. HalsKarin Everschor-sittesubject
PhysicsCondensed Matter - Materials ScienceCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsTerahertz radiationMagnetic monopoleMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesOrder (ring theory)02 engineering and technologyPhysik (inkl. Astronomie)021001 nanoscience & nanotechnologyCoupling (probability)01 natural sciencesMagnetic fieldMagnetizationMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesAntiferromagnetismCondensed Matter::Strongly Correlated ElectronsTwist010306 general physics0210 nano-technologydescription
Thin-film antiferromagnets (AFs) with Rashba spin-orbit coupling are theoretically investigated. We demonstrate that the relativistic Dzyaloshinskii-Moriya interaction (DMI) produces a large surface magnetization and a boundary-driven twist state in the antiferromagnetic N\' eel vector. We predict a magnetization on the order of $2.3\cdot 10^4$~A/m, which is comparable to the magnetization of ferromagnetic semiconductors. Importantly, the magnetization is characterized by ultra-fast terahertz dynamics and provides new approaches for efficiently probing and controlling the spin dynamics of AFs as well as detecting the antiferromagnetic DMI. Notably, the magnetization does not lead to any stray magnetic fields except at corners where weak magnetic monopole fields appear.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-06-18 | Physical Review B |