Exchange-Coupling-Induced Symmetry Breaking in Topological Insulators
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Wei-2013-Exchange-coupling-induced symmetry.pdf
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Author(s)
Wei, Peng
Katmis, Ferhat
Assaf, Badih A.
Steinberg, Hadar
Jarillo-Herrero, Pablo
Heiman, D.
Moodera, Jagadeesh
Date Issued
April 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Wei, Peng, Ferhat Katmis, Badih A. Assaf, Hadar Steinberg, Pablo Jarillo-Herrero, Donald Heiman, and Jagadeesh S. Moodera. Exchange-Coupling-Induced Symmetry Breaking in Topological Insulators. Physical Review Letters 110, no. 18 (April 2013). © 2013 American Physical Society.
Version
Final published version
Abstract
An exchange gap in the Dirac surface states of a topological insulator (TI) is necessary for observing the predicted unique features such as the topological magnetoelectric effect as well as to confine Majorana fermions. We experimentally demonstrate proximity-induced ferromagnetism in a TI, combining a ferromagnetic insulator EuS layer with Bi2Se3, without introducing defects. By magnetic and magnetotransport studies, including anomalous Hall effect and magnetoresistance measurements, we show the emergence of a ferromagnetic phase in TI, a step forward in unveiling their exotic properties.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Plasma Science and Fusion Center
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.110.186807
