Topological Magnons and Edge States in Antiferromagnetic Skyrmion Crystals.

@article{Daz2018TopologicalMA,
  title={Topological Magnons and Edge States in Antiferromagnetic Skyrmion Crystals.},
  author={Sebasti{\'a}n A. D{\'i}az and Jelena Klinovaja and Daniel Loss},
  journal={Physical review letters},
  year={2018},
  volume={122 18},
  pages={
          187203
        }
}
Antiferromagnetic skyrmion crystals are magnetic phases predicted to exist in antiferromagnets with Dzyaloshinskii-Moriya interactions. Their spatially periodic noncollinear magnetic texture gives rise to topological bulk magnon bands characterized by nonzero Chern numbers. We find topologically protected chiral magnonic edge states over a wide range of magnetic fields and Dzyaloshinskii-Moriya interaction values. Moreover, and of particular importance for experimental realizations, edge states… 

Figures from this paper

Magnonic Quadrupole Topological Insulator in Antiskyrmion Crystals.

We uncover that antiskyrmion crystals provide an experimentally accessible platform to realize a magnonic quadrupole topological insulator, whose hallmark signatures are robust magnonic corner

Topological Hall effect and emergent skyrmion crystal at manganite-iridate oxide interfaces

The competition between the Dzyaloshinskii-Moriya interaction and magnetic exchange interactions is known to create exotic spin textures such as spin-spiral and skyrmion-crystal phases. Using Monte

Quantum topological phase transitions in skyrmion crystals

Topological order is important in many aspects of condensed matter physics, and has been extended to bosonic systems. In this Letter we report the non-trivial topology of the magnon bands in two

Chiral magnonic edge states in ferromagnetic skyrmion crystals controlled by magnetic fields

The authors show that a ferromagnetic skyrmion crystal provides a novel platform for switchable magnon currents. Taking advantage of a topological phase transition in the magnon spectrum, an external

From skyrmions to Z2 vortices in distorted chiral antiferromagnets

Swirling topological spin configurations, known as magnetic skyrmions, are known to be stabilised in chiral ferromagnets with Dzyaloshinskii-Moriya interaction (DMI). In particular, for appropriate

Quantum damping of skyrmion crystal eigenmodes due to spontaneous quasiparticle decay

The elementary excitations of skyrmion crystals experience both emergent magnetic fields and anharmonic interactions brought about by the topologically nontrivial noncollinear texture. The resulting

Topological Magnon-Phonon Hybrid Excitations in Two-Dimensional Ferromagnets with Tunable Chern Numbers.

The results show that a simple ferromagnet on a square lattice supports topologically nontrivial magnon polarons, generalizing topological excitations in conventional magnetic systems.

SU(3) Topology of Magnon-Phonon Hybridization in 2D Antiferromagnets.

It is envisioned that the magnetoelastic coupling in antiferromagnets can be a promising venue in search of various topological excitations, which cannot be found in magnetic or elastic models alone.

Field-induced pseudo-skyrmion phase in the antiferromagnetic kagome lattice

We study the effects of an in-plane Dzyaloshinskii-Moriya interaction under an external magnetic field in the highly frustrated kagome antiferromagnet. We focus on the low-temperature phase diagram,

Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice

The topological Hall effect (THE), given by a composite of electric and topologically nontrivial spin texture is commonly observed in magnetic skyrmion crystals. Here we present a study of the THE of
...

References

SHOWING 1-10 OF 100 REFERENCES

Edge states in topological magnon insulators

For magnons, the Dzyaloshinskii-Moriya interaction accounts for spin-orbit interaction and causes a nontrivial topology that allows for topological magnon insulators. In this theoretical

Static and Dynamical Properties of Antiferromagnetic Skyrmions in the Presence of Applied Current and Temperature.

It is found that the composite nature of antiferromagnetic Skyrmions gives rise to different dynamical behavior due to both an applied current and temperature effects.

Topological magnons in Kitaev magnets at high fields

Spin-orbit coupled honeycomb lattice magnets offer a route to novel states of matter through the presence of significant Kitaev exchange coupling. Here, the authors explored the spin-polarized

Chiral topological insulator of magnons

We propose a magnon realization of 3D topological insulator in the AIII (chiral symmetry) topological class. The topological magnon gap opens due to the presence of Dzyaloshinskii-Moriya

Three-sublattice skyrmion crystal in the antiferromagnetic triangular lattice

The frustrated classical antiferromagnetic Heisenberg model with Dzyaloshinskii-Moriya (DM) interactions on the triangular lattice is studied under a magnetic field by means of semiclassical

Skyrmion Lattice in a Chiral Magnet

This study experimentally establishes magnetic materials lacking inversion symmetry as an arena for new forms of crystalline order composed of topologically stable spin states in the chiral itinerant-electron magnet MnSi.

Topological chiral magnonic edge mode in a magnonic crystal

Topological phases have been explored in various fields in physics such as spintronics, photonics, liquid helium, correlated electron system and cold-atomic system. This leads to the recent

Spin Nernst Effect of Magnons in Collinear Antiferromagnets.

It is found that magnons around the Γ point and the K point contribute oppositely to the transverse spin transport, and their competition leads to a sign change of the spin Nernst coefficient at finite temperature.

Magnon nodal-line semimetals and drumhead surface states in anisotropic pyrochlore ferromagnets

We introduce a type of topological magnon matter: the magnonic pendant to electronic nodal-line semimetals. Magnon spectra of anisotropic pyrochlore ferromagnets feature twofold degeneracies of

Antiferromagnetic skyrmion crystals: Generation, topological Hall, and topological spin Hall effect

Skyrmions are topologically nontrivial, magnetic quasiparticles that are characterized by a topological charge. A regular array of skyrmions, a skyrmion crystal (SkX), features the topological Hall
...