具有轴向绝缘体分类的磁性 Zintl Eu3In2As4 纳米线的顶轴相互交换生长。

IF 38.1 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Man Suk Song, Lothar Houben, Yufei Zhao, Hyeonhu Bae, Nadav Rothem, Ambikesh Gupta, Binghai Yan, Beena Kalisky, Magdalena Zaluska-Kotur, Perla Kacman, Hadas Shtrikman, Haim Beidenkopf
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引用次数: 0

摘要

由于准一维约束,纳米线具有独特的电子特性,可促进特定器件架构的发展。然而,纳米线的生长面临着巨大的挑战,限制了可获得的晶体结构和元素组成。在这里,我们展示了固态拓扑交换技术,它能将钨锆InAs纳米线转化为Zintl Eu3In2As4。基于分子束外延技术将 Eu 和 As 原位蒸发到 InAs 纳米线上,导致外壳的 Eu 和内核的 In 相互交换。因此,单相 Eu3In2As4 外壳逐渐生长,并逐渐消耗 InAs 内核。砷基质的亚结构支持了这种相互交换,这种亚结构在晶格InAs和Zintl Eu3In2As4中相似,因此具有拓扑结构。Ab initio 计算证实了反铁磁基态,并将 Eu3In2As4 归类为 C2T 轴向绝缘体,同时容纳了手性铰链模式和未钉住的狄拉克表面态。因此,拓扑相互交换纳米线生长将有助于探索 Eu3In2As4 以及其他奇异化合物中错综复杂的磁拓扑状态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Topotaxial mutual-exchange growth of magnetic Zintl Eu3In2As4 nanowires with axion insulator classification

Topotaxial mutual-exchange growth of magnetic Zintl Eu3In2As4 nanowires with axion insulator classification

Topotaxial mutual-exchange growth of magnetic Zintl Eu3In2As4 nanowires with axion insulator classification
Due to quasi-one-dimensional confinement, nanowires possess unique electronic properties, which can promote specific device architectures. However, nanowire growth presents paramount challenges, limiting the accessible crystal structures and elemental compositions. Here we demonstrate solid-state topotactic exchange that converts wurtzite InAs nanowires into Zintl Eu3In2As4. Molecular-beam-epitaxy-based in situ evaporation of Eu and As onto InAs nanowires results in the mutual exchange of Eu from the shell and In from the core. Therefore, a single-phase Eu3In2As4 shell grows, which gradually consumes the InAs core. The mutual exchange is supported by the substructure of the As matrix, which is similar across the wurtzite InAs and Zintl Eu3In2As4 and therefore is topotactic. The Eu3In2As4 nanowires undergo an antiferromagnetic transition at a Néel temperature of ~6.5 K. Ab initio calculations confirm the antiferromagnetic ground state and classify Eu3In2As4 as a C2T axion insulator, hosting both chiral hinge modes and unpinned Dirac surface states. The topotactic mutual-exchange nanowire growth will, thus, enable the exploration of intricate magneto-topological states in Eu3In2As4 and potentially in other exotic compounds. In situ evaporation of Eu and As onto InAs nanowires results in the mutual exchange of Eu from the shell with In from the core. This solid-state exchange reaction converts wurtzite InAs nanowires into Zintl Eu3In2As4.
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来源期刊
Nature nanotechnology
Nature nanotechnology 工程技术-材料科学:综合
CiteScore
59.70
自引率
0.80%
发文量
196
审稿时长
4-8 weeks
期刊介绍: Nature Nanotechnology is a prestigious journal that publishes high-quality papers in various areas of nanoscience and nanotechnology. The journal focuses on the design, characterization, and production of structures, devices, and systems that manipulate and control materials at atomic, molecular, and macromolecular scales. It encompasses both bottom-up and top-down approaches, as well as their combinations. Furthermore, Nature Nanotechnology fosters the exchange of ideas among researchers from diverse disciplines such as chemistry, physics, material science, biomedical research, engineering, and more. It promotes collaboration at the forefront of this multidisciplinary field. The journal covers a wide range of topics, from fundamental research in physics, chemistry, and biology, including computational work and simulations, to the development of innovative devices and technologies for various industrial sectors such as information technology, medicine, manufacturing, high-performance materials, energy, and environmental technologies. It includes coverage of organic, inorganic, and hybrid materials.
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