论文标题
新颖的磁性状态和Kagome晶格金属ymn $ _ {6} $ sn $ _ {6} $
Novel magnetic states and nematic spin chirality in the kagome lattice metal YMn$_{6}$Sn$_{6}$
论文作者
论文摘要
对新型磁纹理的识别，理解和操纵对于发现未来基于自旋的电子设备的新量子材料至关重要。特别是，表现出对外部刺激（例如磁场）的巨大反应的材料经过深入研究。在这里，我们通过磁力测定法，传输和中子衍射测量结果与第一原理计算一起研究Kagome-Net磁铁YMN $ _ {6} $ sn $ _ {6} $。我们确定了许多非平凡的磁相，解释它们的微观性质，并证明其中一个具有大型拓扑厅效应（The）。我们提出了一种新的nematic手性机制，让人联想到基于Fe的超导体中的nematicity，这导致了升高的温度。这种有趣的物理学来自触发强烈磁波动的参数沮丧的平面交换相互作用。我们的结果铺平了通往新的手性旋转纹理的途径，这是新型旋转型的有望。
Identification, understanding, and manipulation of novel magnetic textures is essential for the discovery of new quantum materials for future spin-based electronic devices. In particular, materials that manifest a large response to external stimuli such as a magnetic field are subject to intense investigation. Here, we study the kagome-net magnet YMn$_{6}$Sn$_{6}$ by magnetometry, transport, and neutron diffraction measurements combined with first principles calculations. We identify a number of nontrivial magnetic phases, explain their microscopic nature, and demonstrate that one of them hosts a large topological Hall effect (THE). We propose a new nematic chirality mechanism, reminiscent of the nematicity in Fe-based superconductors, which leads to the THE at elevated temperatures. This interesting physics comes from parametrically frustrated interplanar exchange interactions that trigger strong magnetic fluctuations. Our results pave a path to new chiral spin textures, promising for novel spintronics.
