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arXiv 2207.07375cond-mat.str-el
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在无DM相互作用的铁磁/反铁磁双层膜中设计Skyrmion晶体

Engineering a skyrmion crystal in ferromagnetic/antiferromagnetic bilayers free from the DM interaction

Kazuki Okigami, Ryota Yambe, Satoru Hayami

摘要:

本文从理论上提出了一种新的Skyrmion晶体(SkX)的稳定机制。通过进行变分计算和蒙特卡罗模拟在一个互补的方式,我们发现,铁磁和反铁磁层之间的磁挫折是一个源的有限Q螺旋状态和SkX在强层间耦合制度。我们还表明,挫折的程度有关的层间交换相互作用。层间耦合越强,阻挫效应越大,导致SkX的稳定化。本研究结果不仅提供了一种在铁磁/反铁磁畴和异质结构中设计SkX的方法,而且暗示了基于轨道间阻挫的SkX的可能性。

英文摘要:

We theoretically propose a new stabilization mechanism of a skyrmion crystal (SkX) in a bilayer triangular lattice system consisting of the ferromagnetic and the antiferromagnetic layers. By performing variational calculations and Monte Carlo simulations in a complementary way, we find that a magnetic frustration between the ferromagnetic and antiferromagnetic layers is a source of a finite-Q spiral state and the SkX in the strong interlayer coupling regime. We also show that the degree of frustration is related to the interlayer exchange interaction. The stronger interlayer coupling tends to make the effect of frustration larger, which results in the stabilization of the SkX. The present results not only provide a way of engineering the SkX in the ferromagnetic/antiferromagnetic domain and heterostructure but also imply the possibility of the SkX based on interorbital frustration scenario.

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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