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Magnetic proximity effect in the topological insulator BiSbTeSe 2
Author(s) -
Banerjee Karan,
Besbas Jean,
Ren Peng,
Wang* Lan,
Yang Hyunsoo
Publication year - 2015
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201510029
Subject(s) - topological insulator , condensed matter physics , yttrium iron garnet , magnetoresistance , magnetic field , symmetry (geometry) , insulator (electricity) , physics , yttrium , topology (electrical circuits) , materials science , quantum mechanics , geometry , optoelectronics , mathematics , combinatorics , metallurgy , oxide
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 2 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 2 . (© 2015 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)