Magnetic proximity effect in the topological insulator BiSbTeSe2

Banerjee, K, Besbas, J, Ren, P, Wang, L and Yang, H 2015, 'Magnetic proximity effect in the topological insulator BiSbTeSe2', Physica Status Solidi - Rapid Research Letters, vol. 9, no. 3, pp. 175-179.

Document type: Journal Article
Collection: Journal Articles

Title Magnetic proximity effect in the topological insulator BiSbTeSe2
Author(s) Banerjee, K
Besbas, J
Ren, P
Wang, L
Yang, H
Year 2015
Journal name Physica Status Solidi - Rapid Research Letters
Volume number 9
Issue number 3
Start page 175
End page 179
Total pages 5
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Abstract Magnetic proximity effects can lead to novel phenomena in the transport properties of topological insulators. In this study, we demonstrate a characteristic fourfold symmetry in the angular dependence of magnetoresistance in the topological insulator BiSbTeSe<inf>2</inf> exfoliated onto magnetic insulator yttrium iron garnet substrates. The observed symmetry is seen to arise when the external magnetic field is in-plane to the current direction and gets enhanced at large field magnitudes. Increasing the temperature and current density diminishes the fourfold symmetry. The symmetry seems to be a signature of the proximity effect from the underlying magnetic substrate on BiSbTeSe<inf>2</inf>.
Subject Condensed Matter Physics not elsewhere classified
Keyword(s) Angular dependences
Magnetic proximity
Topological insulators
Yttrium iron garnets
DOI - identifier 10.1002/pssr.201510029
Copyright notice © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN 1862-6254
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