TY  - JOUR
AU  - Dos Santos, Flaviano José
AU  - dos Santos Dias, Manuel
AU  - Lounis, Samir
TI  - Modeling spin waves in noncollinear antiferromagnets: Spin-flop states, spin spirals, skyrmions, and antiskyrmions
JO  - Physical review / B
VL  - 102
IS  - 10
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2020-05049
SP  - 104436
PY  - 2020
AB  - Spin waves in antiferromagnetic materials have great potential for next-generation magnonic technologies. However, their properties and their dependence on the type of ground-state antiferromagnetic structure are still open questions. Here, we investigate theoretically spin waves in one- and two-dimensional model systems with a focus on noncollinear antiferromagnetic textures such as spin spirals and skyrmions of opposite topological charges. We address in particular the nonreciprocal spin excitations recently measured in bulk antiferromagnet α−Cu2V2O7 utilizing inelastic neutron scattering experiments [Phys. Rev. Lett. 119, 047201 (2017)], where we help to characterize the nature of the detected spin-wave modes. Furthermore, we discuss how the Dzyaloshinskii-Moriya interaction can lift the degeneracy of the spin-wave modes in antiferromagnets, resembling the electronic Rashba splitting. We consider the spin-wave excitations in antiferromagnetic spin-spiral and skyrmion systems and discuss the features of their inelastic scattering spectra. We demonstrate that antiskyrmions can be obtained with an isotropic Dzyaloshinskii-Moriya interaction in certain antiferromagnets.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000573773300004
DO  - DOI:10.1103/PhysRevB.102.104436
UR  - https://juser.fz-juelich.de/record/888593
ER  -