Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator

K. Yasuda, A. Tsukazaki, R. Yoshimi, K. S. Takahashi, M. Kawasaki, Y. Tokura

研究成果: Article査読

107 被引用数 (Scopus)

抄録

We report current-direction dependent or unidirectional magnetoresistance (UMR) in magnetic or nonmagnetic topological insulator (TI) heterostructures, Crx(Bi1-ySby)2-xTe3/(Bi1-ySby)2Te3, that is several orders of magnitude larger than in other reported systems. From the magnetic field and temperature dependence, the UMR is identified to originate from the asymmetric scattering of electrons by magnons. In particular, the large magnitude of UMR is an outcome of spin-momentum locking and a small Fermi wave number at the surface of TI. In fact, the UMR is maximized around the Dirac point with the minimal Fermi wave number.

本文言語English
論文番号127202
ジャーナルPhysical review letters
117
12
DOI
出版ステータスPublished - 2016 9月 14

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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