论文标题
Kagome Magnet Fe $ {_ 3} $ sn $ {_ 2} $和SN模块的异质结构的原子层外观
Atomic Layer Epitaxy of Kagome Magnet Fe${_3}$Sn${_2}$ and Sn-modulated Heterostructures
论文作者
论文摘要
带有kagome晶体结构的磁性材料表现出丰富的物理学，例如沮丧的磁性，天空形成，拓扑平坦带和狄拉克/Weyl点。直到最近，大多数关于kagome磁铁的研究都已在散装晶体或多晶膜上进行。在这里，我们报告了拓扑kagome磁铁fe $ {_ 3} $ sn $ {_ 2} $的高质量薄膜的原子层分子束外延合成。 Fe $ {_ 3} $ sn $ {_ 2} $的结构和磁性表征在外部PT（111）上识别具有C平面方向的高度有序的膜，并具有平面磁性易于轴。通过异常的Nernst效应成像对局部磁结构的研究揭示了面向内部的千分尺域域。由Fe $ {_ 3} $ sn $ {_ 2} $和Fe $ {_ 3} $ SN组成的超级晶格结构也由原子层分子束外延合成，证明了在原子水平上调节样品结构的能力。原子层分子束外延对高质量膜的实现为探索该系统的丰富物理学打开了大门，并通过将FE $ {_ 3} $ sn $ {_ 2} $与其他材料连接到新的自旋现象。
Magnetic materials with kagome crystal structure exhibit rich physics such as frustrated magnetism, skyrmion formation, topological flat bands, and Dirac/Weyl points. Until recently, most studies on kagome magnets have been performed on bulk crystals or polycrystalline films. Here we report the atomic layer molecular beam epitaxy synthesis of high-quality thin films of topological kagome magnet Fe${_3}$Sn${_2}$. Structural and magnetic characterization of Fe${_3}$Sn${_2}$ on epitaxial Pt(111) identifies highly ordered films with c-plane orientation and an in-plane magnetic easy axis. Studies of the local magnetic structure by anomalous Nernst effect imaging reveals in-plane oriented micrometer size domains. Superlattice structures consisting of Fe${_3}$Sn${_2}$ and Fe${_3}$Sn are also synthesized by atomic layer molecular beam epitaxy, demonstrating the ability to modulate the sample structure at the atomic level. The realization of high-quality films by atomic layer molecular beam epitaxy opens the door to explore the rich physics of this system and investigate novel spintronic phenomena by interfacing Fe${_3}$Sn${_2}$ with other materials.
