论文标题
矩形和方形的Skyrmion晶体，在中心对称方形晶格上，易于轴各向异性
Rectangular and square skyrmion crystals on a centrosymmetric square lattice with easy-axis anisotropy
论文作者
论文摘要
我们报告了有关矩形和方形磁性晶体晶体在具有磁各向异性的中心对称方格上的出现的理论结果。通过在平方晶格上使用易于轴的单离子各向异性进行挫败的自旋模型进行模拟退火，我们发现在动量空间中相互作用的竞争会导致两个天空晶体的形成，其中天际核心在矩形或方形 - 晶格中对齐。尤其是，高谐波波矢量的相互作用在稳定方形/矩形天空晶体方面起着重要作用。我们的结果提供了参考，以探索中心对称四方系统中进一步的Skyrmion-Hosting材料。
We report our theoretical results on the emergence of rectangular- and square-shaped magnetic skyrmion crystals on a centrosymmetric square lattice with magnetic anisotropy. By performing the simulated annealing for a frustrated spin model with an easy-axis single-ion anisotropy on a square lattice, we find that a competition of the interactions in momentum space gives rise to the formation of two skyrmion crystals, where the skyrmion cores are aligned in a rectangle- or square-lattice way. Especially, the interactions at the higher harmonic wave vectors play an important role in stabilizing the square/rectangular skyrmion crystals. Our results provide a reference to explore further skyrmion-hosting materials in centrosymmetric tetragonal systems.
