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arXiv 1801.08041cond-mat.mtrl-sci
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立方螺旋磁网中Skyrmion晶格的可调表面构型

Tunable surface configuration of skyrmion lattices in cubic helimagnets

Xuejin Wan, Yangfan Hu, Biao Wang

摘要:

在体螺旋磁网络中,由于内禀磁弹性耦合,磁skyrmion晶格的存在总是伴随着周期性的应力场。这种非平凡的应力场在表面的释放导致一个周期性的位移场,它表征了一种新的类粒子性质的Skyrmion:它的表面配置。在这里,我们推导出这种位移场的解析解半无限立方helimagnets时skyrmions存在。对于锰硅,我们表明,Skyrmion晶格具有凹凸不平的表面配置,其特征在于周期性排列的峰与约10 $^{-13}$ m的特征高度。可以通过改变所施加的磁场的强度来控制峰的图案。此外,我们还证明了表面构形随Skyrmion晶格的运动和变形而变化。因此,表面构型可以通过施加电流、机械载荷以及对skyrmions有影响的任何其他形式的外部场来调整。

英文摘要:

In bulk helimagnets, the presence of magnetic skyrmion lattices is always accompanied by a periodic stress field due to the intrinsic magnetoelastic coupling. The release of this nontrivial stress field at the surface causes a periodic displacement field, which characterizes a novel particle-like property of skyrmion: its surface configuration. Here, we derive the analytical solution of this displacement field for semi-infinite cubic helimagnets when skyrmions are present. For MnSi, we show that the skyrmion lattices have a bumpy surface configuration characterized by periodically arranged peaks with a characteristic height of about 10$^{-13}$ m. The pattern of the peaks can be controlled by varying the strength of the applied magnetic field. Moreover, we prove that the surface configuration varies together with the motion and deformation of the skyrmion lattices. As a result, the surface configuration can be tuned by application of electric current, mechanical loads, as well as any other form of external field which has an effect on the skyrmions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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