Large anomalous Hall effect in ferromagnetic insulator-topological insulator heterostructures

被引：114
作者：
Alegria, L. D. [1 ]
Ji, H. [2 ]
Yao, N. [3 ]
Clarke, J. J. [4 ]
Cava, R. J. [2 ]
Petta, J. R. [1 ]
机构：
[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA
[2] Princeton Univ, Dept Chem, Princeton, NJ 08544 USA
[3] Princeton Univ, Princeton Inst Sci & Technol Mat, Princeton, NJ 08544 USA
[4] Hitachi High Technol Amer Inc, Clarksburg, MD 20871 USA
来源：
APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 05期
基金：
美国国家科学基金会;
关键词：
SURFACE; CONDUCTION; ELECTRONS; BI2SE3; FILMS;
D O I：
10.1063/1.4892353
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate the van der Waals epitaxy of the topological insulator compound Bi2Te3 on the ferromagnetic insulator Cr2Ge2Te6. The layers are oriented with (001) Bi2Te3 vertical bar vertical bar(001)Cr2Ge2Te6 and (110)Bi2Te3 vertical bar vertical bar(100)Cr2Ge2Te6. Cross-sectional transmission electron microscopy indicates the formation of a sharp interface. At low temperatures, bilayers consisting of Bi2Te3 on Cr2Ge2Te6 exhibit a large anomalous Hall effect (AHE). Tilted field studies of the AHE indicate that the easy axis lies along the c-axis of the heterostructure, consistent with magnetization measurements in bulk Cr2Ge2Te6. The 61K Curie temperature of Cr2Ge2Te6 and the use of near-stoichiometric materials may lead to the development of spintronic devices based on the AHE. (C) 2014 AIP Publishing LLC.
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页数：5
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