论文标题
在非共线性抗铁磁铁中建模自旋波：自旋流动状态，自旋螺旋，天空和反孔mions
Modelling spin waves in noncollinear antiferromagnets: spin-flop states, spin spirals, skyrmions and antiskyrmions
论文作者
论文摘要
抗铁磁材料中的自旋波对于下一代宏伟的镁质技术具有巨大的潜力。但是，它们的性质及其对地面抗磁磁结构类型的依赖仍然是空的问题。在这里，我们研究了一维模型系统中的理论上自旋波，重点是非共线性抗铁磁纹理，例如旋转螺旋和相反拓扑电荷的天空。我们特别解决了最近以批量抗fiferromagnet $α$ - $ \ text {cu} _2 _2 \ text {v} _2 \ text {o} _7 $利用弹性中子散射实验[Phys。\ rev。\ textt textt texttttttemtt {_111111， （2017），我们在其中帮助表征检测到的自旋波模式的性质。此外，我们讨论了dzyaloshinskii-moriya的相互作用如何提高反铁磁体中自旋模式的变性，从而类似于电子rashba分裂。我们考虑了抗铁磁旋转螺旋和天空系统中的自旋波激发，并讨论了其非弹性散射光谱的特征。我们证明，可以在某些抗铁磁铁中使用各向同性dzyaloshinskii-moriya相互作用来获得抗缓肌。
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 $α$--$\text{Cu}_2\text{V}_2\text{O}_7$ utilizing inelastic neutron scattering experiments [Phys.\ Rev.\ Lett.\ \textbf{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.
