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19 April 2024

» arxiv » 1505.2306

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Proximity Driven Enhanced Magnetic Order at Ferromagnetic Insulator / Magnetic Topological Insulator Interface
Mingda Li ; Cui-Zu Chang ; Brian. J. Kirby ; Michelle Jamer ; Wenping Cui ; Lijun Wu ; Yimei Zhu ; Don Heiman ; Ju Li ; Jagadeesh Moodera ;
Date:	9 May 2015
Abstract:	Magnetic exchange driven proximity effect at a magnetic insulator / topological insulator (MI/TI) interface provides a rich playground for novel phenomena as well as a way to realize low energy dissipation quantum devices. Here we report a dramatic enhancement of proximity exchange coupling in the MI / magnetic-TI EuS / Sb$_{2-x}$V$_x$Te$_3$ hybrid heterostructure, where V doping is used to drive the TI (Sb$_{2}$Te$_3$) magnetic. We observe an artificial antiferromagnetic-like structure near the MI/TI interface, which may account for the enhanced proximity coupling. The interplay between the proximity effect and doping provides insights into controllable engineering of magnetic order using a hybrid heterostructure.
Source:	arXiv, 1505.2306
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