A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons
arXiv:1902.09704 · doi:10.1038/s41598-019-51646-3
Abstract
Antiferromagnetic two-dimensional (2D) materials are currently under intensive theoretical and experimental investigations in view of their potential applications in antiferromagnet-based magnonic and spintronic devices. Recent experimental studies revealed the importance of magnetic anisotropy and Dzyaloshinskii-Moriya interactions (DMI) on the ordered ground state and the magnetic excitations in these materials. Here we present a robust classical field theory approach to analyze the effect of magnetic anisotropy and Dzyaloshinskii-Moriya interactions (DMI) on the edge and bulk spin waves in 2D antiferromagnetic nanoribbons. We predict the existence of a new class of nonreciprocal edge spin waves characterized by opposite polarizations in opposite directions. These novel edge spin waves are induced by the DMI and are fundamentally different from conventional nonreciprocal spin waves for which the polarization is independent of the propagation direction. Aside this breakthrough in the field of antiferromagnetic spin waves, the study further analysis the effect of the edges structure on the magnetic excitations. In particular, we show that anisotropic bearded edges nanoribbons act as magnetic topological insulators with exceptionally interesting potentials for applications in magnonics.
References in corpus (19)
- Ising-Type Magnetic Ordering in Atomically Thin FePS3
- Room temperature magnetic order on zigzag edges of narrow graphene nanoribbons
- Topological spin excitations in honeycomb ferromagnet CrI
- Large voltage tuning of Dzyaloshinskii-Moriya Interaction: a route towards dynamic control of skyrmion chirality
- Magnon transport in quasi-two-dimensional van der Waals antiferromagnets
- Raman fingerprint of two terahertz spin wave branches in a two-dimensional honeycomb Ising ferromagnet
- Antiferromagnetic Domain Wall as Spin Wave Polarizer and Retarder
- Signature of magnon Nernst effect in an antiferromagnetic insulator
- Scattering of surface and volume spin waves in a magnonic crystal
- Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film
- Long-Distance Spin Transport Through a Graphene Quantum Hall Antiferromagnet
- Creation of uni-directional spin-wave emitters by utilizing interfacial Dzyaloshinskii-Moriya interaction
- Electrical generation and detection of spin waves in a quantum Hall ferromagnet
- Flat Bands, Indirect Gaps, and Unconventional Spin-Wave Behavior Induced by a Periodic Dzyaloshinskii-Moriya Interaction
- Edge states in a ferromagnetic honeycomb lattice with armchair boundaries
- Edge on-site potential effects in a honeycomb topological magnon insulator
- Relativistic ferromagnetic magnon at the zigzag edge of graphene
- Topological magnon nodal-lines and absence of magnon spin Nernst effect in layered collinear antiferromagnets
- Asymmetric dynamics of edge exchange spin waves in honeycomb nanoribbons with zigzag and bearded edges boundaries
Cited by in corpus (4)
- Magnon magic angles and tunable Hall conductivity in 2D twisted ferromagnetic bilayers
- Valley-polarized domain wall magnons in 2D ferromagnetic bilayers
- Theoretical realization of rich magnon topology by symmetry-breaking in honeycomb bilayer ferromagnets
- Electric polarization induced by magnons and magnon Nernst effects