Flexoresponses of Synthetic Antiferromagnetic Systems Hosting Skyrmions,Physical Review Letters

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Flexoresponses of Synthetic Antiferromagnetic Systems Hosting Skyrmions
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-06-21 , DOI: 10.1103/physrevlett.128.257201
Linjie Liu _{1,

2,

3} , Weijin Chen _{1,

2,

3,

4} , Yue Zheng _{1,

2,

3}

Affiliation

While strain gradients break lattice centrosymmetry, ferromagnetism is a time-reversal symmetry breaking product. Flexomagnetic effect in ferromagnets is usually indirect and weak. In this Letter, we reveal a topologically enhanced flexomagnetic effect in synthetic antiferromagnetic systems based on Dzyaloshinskii-Moriya interaction and the large deformability of skyrmion. Moreover, the synthetic antiferromagnetic skyrmion exhibits an unexpected Hall effect under strain gradient. We propose that this flexo-Hall effect originates from a geometric Magnus force related to the asymmetric deformation of skyrmion. Our results shed new insights into the flexoresponses in systems hosting topological structures and may open up a new field—“flexoskyrmionics”.

中文翻译：

托管 Skyrmions 的合成反铁磁系统的弹性响应

虽然应变梯度破坏了晶格中心对称性，但铁磁性是一种时间反演对称性破坏产物。铁磁体中的柔磁效应通常是间接的和微弱的。在这封信中，我们揭示了基于 Dzyaloshinskii-Moriya 相互作用和 skyrmion 的大可变形性的合成反铁磁系统中拓扑增强的柔磁效应。此外，合成的反铁磁斯格明子在应变梯度下表现出意想不到的霍尔效应。我们提出这种柔性霍尔效应源于与斯格明子不对称变形相关的几何马格努斯力。我们的研究结果为托管拓扑结构的系统中的屈曲响应提供了新的见解，并可能开辟一个新领域——“flexoskyrmionics”。

更新日期：2022-06-21

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