Dipolar spin waves in uniaxial easy-axis antiferromagnets: A natural topological nodal-line semimetal
Jie Liu, Lin Wang, Ka Shen
Abstract
The authors show that the dipole-dipole interaction drives the magnons in any uniaxial easy-axis antiferromagnet into a topological nodal-line semimetal phase, which hosts surface modes with chirality-momentum locking.
Topics & Concepts
MagnonCondensed matter physicsAntiferromagnetismPhysicsSemimetalSpin (aerodynamics)Spin waveNatural (archaeology)Surface (topology)DipoleTopological insulatorTopology (electrical circuits)Weyl semimetalFerromagnetismSurface statesTopological Materials and PhenomenaMagnetic properties of thin filmsChemical and Physical Properties of Materials