Large Anomalous Hall Effect in Topological Insulators with Proximitized Ferromagnetic Insulators

Physical Review Letters
Masataka MogiY Tokura

Abstract

We report a proximity-driven large anomalous Hall effect in all-telluride heterostructures consisting of the ferromagnetic insulator Cr_{2}Ge_{2}Te_{6} and topological insulator (Bi,Sb)_{2}Te_{3}. Despite small magnetization in the (Bi,Sb)_{2}Te_{3} layer, the anomalous Hall conductivity reaches a large value of 0.2e^{2}/h in accord with a ferromagnetic response of the Cr_{2}Ge_{2}Te_{6}. The results show that the exchange coupling between the surface state of the topological insulator and the proximitized Cr_{2}Ge_{2}Te_{6} layer is effective and strong enough to open the sizable exchange gap in the surface state.

References

Oct 10, 2006·Physical Review Letters·N A SinitsynA H MacDonald
Dec 8, 2011·Nature Communications·Jinsong ZhangYayu Wang
Dec 12, 2012·Physical Review Letters·Brian SkinnerB I Shklovskii
May 21, 2013·Physical Review Letters·Peng WeiJagadeesh S Moodera
Jan 22, 2015·Proceedings of the National Academy of Sciences of the United States of America·Inhee LeeJ C Séamus Davis
Nov 26, 2015·Science Advances·Ella O LachmanEli Zeldov
Oct 11, 2017·Science Advances·Masataka MogiYoshinori Tokura

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Citations

Jul 1, 2020·Science Advances·Lei PanKang L Wang
Sep 17, 2020·Science Advances·Lei PanKang L Wang
May 8, 2021·Physical Review Letters·Pablo M Perez-Piskunow, Stephan Roche
Jun 27, 2021·Advanced Materials·Weizhuang ZhuoXianhui Chen
Jun 30, 2021·Advanced Materials·Semonti BhattacharyyaMichael S Fuhrer
Dec 22, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Hiroyuki AokiMikihito Takenaka

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