神目磁铁 RMn6Sn6(R = Er、Tb)薄膜的原子层分子束外延

IF 5.3 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY APL Materials Pub Date : 2024-04-26 DOI:10.1063/5.0182595
Shuyu Cheng, Binzhi Liu, Igor Lyalin, Wenyi Zhou, Jinwoo Hwang, Roland K. Kawakami
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引用次数: 0

摘要

由于卡戈米晶格的带状结构由拓扑平坦带和狄拉克锥组成,因此引起了人们的极大兴趣。RMn6Sn6(R = 稀土)化合物尤其引人关注,因为它存在巨大的本征反常霍尔效应(AHE),这种效应源自费米级附近的间隙狄拉克锥。这使得 RMn6Sn6 成为实现高温量子反常霍尔效应的杰出候选材料。RMn6Sn6 薄膜的生长有利于基础研究和潜在应用。然而,大多数关于 RMn6Sn6 的研究都集中在体晶上,RMn6Sn6 薄膜的合成迄今尚未见报道。在此,我们报告了 ErMn6Sn6 和 TbMn6Sn6 薄膜的原子层分子束外延生长、结构和磁性表征以及传输特性。特别值得一提的是,TbMn6Sn6 薄膜具有面外磁各向异性,这对于实现量子 AHE 非常重要。我们的工作为使用 RMn6Sn6 薄膜图案化器件控制 AHE 铺平了道路。
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Atomic layer molecular beam epitaxy of kagome magnet RMn6Sn6 (R = Er, Tb) thin films
Kagome lattices have garnered substantial interest because their band structure consists of topological flat bands and Dirac cones. The RMn6Sn6 (R = rare earth) compounds are particularly interesting because of the existence of the large intrinsic anomalous Hall effect (AHE), which originates from the gapped Dirac cones near the Fermi level. This makes RMn6Sn6 an outstanding candidate for realizing the high-temperature quantum AHE. The growth of RMn6Sn6 thin films is beneficial for both fundamental research and potential applications. However, most of the studies on RMn6Sn6 have focused on bulk crystals, and the synthesis of RMn6Sn6 thin films has not been reported so far. Here, we report the atomic layer molecular beam epitaxy growth, structural and magnetic characterizations, and transport properties of ErMn6Sn6 and TbMn6Sn6 thin films. It is especially noteworthy that TbMn6Sn6 thin films have out-of-plane magnetic anisotropy, which is important for realizing the quantum AHE. Our work paves the avenue toward the control of the AHE using devices patterned from RMn6Sn6 thin films.
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来源期刊
APL Materials
APL Materials NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
9.60
自引率
3.30%
发文量
199
审稿时长
2 months
期刊介绍: APL Materials features original, experimental research on significant topical issues within the field of materials science. In order to highlight research at the forefront of materials science, emphasis is given to the quality and timeliness of the work. The journal considers theory or calculation when the work is particularly timely and relevant to applications. In addition to regular articles, the journal also publishes Special Topics, which report on cutting-edge areas in materials science, such as Perovskite Solar Cells, 2D Materials, and Beyond Lithium Ion Batteries.
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