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arXiv 2406.04524cond-mat.str-elcond-mat.mtrl-sci
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中心对称斯格明子材料 GdRu2Si2 的自旋动力学

Spin Dynamics of the Centrosymmetric Skyrmion Material GdRu2Si2

Joseph A. M. Paddison, Juba Bouaziz, Andrew F. May, Qiang Zhang, Stuart Calder, Douglas Abernathy, Julie B. Staunton, Stefan Blügel, Andrew D. Christianson

AI总结:

本文利用中子衍射与谱学结合密度泛函理论计算,研究了中心对称斯格明子材料 GdRu2Si2 的磁相互作用,证明 2-q 拓扑自旋条纹结构优于 1-q 螺旋结构,并揭示了其磁结构随温度的演化规律。

摘要:

磁性斯格明子晶体传统上与不具备中心对称性的晶体结构相关联;然而,已有研究表明,在中心对称晶体中,竞争性相互作用可以稳定斯格明子晶体。为了理解并优化与拓扑非平庸斯格明子织构相关的物理响应,通过将理论预测与谱学数据进行比较来量化其磁相互作用至关重要。在此,我们展示了中心对称斯格明子材料 GdRu$_2$Si$_2$ 的中子衍射和谱学数据,并表明关键谱学特征可以通过使用密度泛函理论计算得到的磁相互作用来解释。我们进一步表明,最近提出的 2-$\mathbf{q}$ “拓扑自旋条纹”结构与我们的数据比 1-$\mathbf{q}$ 螺旋结构具有更好的一致性,并确定了磁结构如何随温度演化。

英文摘要:

Magnetic skyrmion crystals are traditionally associated with non-centrosymmetric crystal structures; however, it has been demonstrated that skyrmion crystals can be stabilized by competing interactions in centrosymmetric crystals. To understand and optimize the physical responses associated with topologically-nontrivial skyrmion textures, it is important to quantify their magnetic interactions by comparing theoretical predictions with spectroscopic data. Here, we present neutron diffraction and spectroscopy data on the centrosymmetric skyrmion material GdRu$_2$Si$_2$, and show that the key spectroscopic features can be explained by the magnetic interactions calculated using density-functional theory calculations. We further show that the recently-proposed 2-$\mathbf{q}$ "topological spin stripe" structure yields better agreement with our data than a 1-$\mathbf{q}$ helical structure, and identify how the magnetic structure evolves with temperature.

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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