6533b835fe1ef96bd129ff4a
RESEARCH PRODUCT
Unidirectional Magnon-Driven Domain Wall Motion Due to the Interfacial Dzyaloshinskii-Moriya Interaction
Hyun-woo LeeSeo Won LeeKyung Jin LeeKarin Everschor-sitteKyoung-whan KimKyoung-whan KimJung Hwan MoonAurelien ManchonGyungchoon Gosubject
PhysicsCondensed Matter - Materials ScienceMagnetic domainCondensed Matter - Mesoscale and Nanoscale Physicsmedia_common.quotation_subjectMagnonGeneral Physics and AstronomyMaterials Science (cond-mat.mtrl-sci)FOS: Physical sciencesPhysik (inkl. Astronomie)01 natural sciencesAsymmetrySymmetry (physics)Explicit symmetry breakingDomain wall (string theory)Classical mechanics0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Quasiparticle010306 general physicsMagnetosphere particle motionmedia_commondescription
We demonstrate a unidirectional motion of a quasiparticle without an explicit symmetry breaking along the space-time coordinate of the particle motion. This counterintuitive behavior originates from a combined action of two intrinsic asymmetries in the other two directions. We realize this idea with the magnon-driven motion of a magnetic domain wall in thin films with interfacial asymmetry. Contrary to previous studies, the domain wall moves along the same direction regardless of the magnon-flow direction. Our general symmetry analysis and numerical simulation reveal that the odd order contributions from the interfacial asymmetry is unidirectional, which is dominant over bidirectional contributions in the realistic regime. We develop a simple analytic theory on the unidirectional motion, which provides an insightful description of this counterintuitive phenomenon.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-03-28 |