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Start Over Author "Heiman, Donald" Journal physical review letters
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2. Exchange-Coupling-Induced Symmetry Breaking in Topological Insulators.

Author

Peng Wei, Katmis, Ferhat, Assaf, Badih A., Steinberg, Hadar, Jarillo-Herrero, Pablo, Heiman, Donald, and Moodera, Jagadeesh S.

Subjects
*SYMMETRY breaking, *TOPOLOGICAL insulators, *MAGNETOELECTRIC effect, *FERROMAGNETISM, *QUANTUM Hall effect
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 magneto-transport 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. [ABSTRACT FROM AUTHOR]

Published
2013
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