Constructing topological insulator-ferromagnet heterojunctions of Bi₂Se₃/Fe₃GeTe₂and Bi₂Te₃/Fe₃GaTe₂.

IF 2.3 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

Journal of Physics: Condensed Matter Pub Date : 2025-02-27 DOI:10.1088/1361-648X/adb274

Xinke Liang, Fuhong Chen, Liu Yang, Tingting Yang, Peiyao Xiao, Yuxiang Liu, Zhiwei Wang, Wende Xiao

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引用次数: 0

Abstract

Heterostructures composed of topological insulators and ferromagnets are predicted to exhibit the quantum anomalous Hall effect (QAHE). The morphology and interfacial structure have a significant impact on physical properties and transport performances of such heterostructures. Here, we report the epitaxial growth of topological insulators Bi₂Se₃and Bi₂Te₃thin films on ferromagnetic substrates of Fe₃GeTe₂and Fe₃GaTe₂, respectively. The morphology and composition of the Bi₂Se₃and Bi₂Te₃thin films were characterized using atomic force microscopy, x-ray photoelectron spectroscopy and Raman spectroscopy. After optimizing growth parameters, we successfully generated large-area films with high crystallinity, presenting new types of topological insulator-ferromagnet heterojunctions for the pursuit of QAHE.

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据预测，由拓扑绝缘体和铁磁体组成的异质结构会表现出量子反常霍尔效应（QAHE）。形貌和界面结构对这类异质结构的物理性质和传输性能有重大影响。在此，我们报告了拓扑绝缘体 Bi2Se3 和 Bi2Te3 薄膜分别在铁磁性基底 Fe3GeTe2 和 Fe3GaTe2 上的外延生长情况。我们使用原子力显微镜、X 射线光电子能谱和拉曼光谱对 Bi2Se3 和 Bi2Te3 薄膜的形貌和成分进行了表征。在优化生长参数后，我们成功制备出了大面积、高结晶度的薄膜，为追求 QAHE. .

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来源期刊

Journal of Physics: Condensed Matter 物理-物理：凝聚态物理

CiteScore

5.30

自引率

7.40%

发文量

1288

审稿时长

2.1 months

期刊介绍： Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.