TY - JOUR
T1 - Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator
AU - Yasuda, K.
AU - Tsukazaki, A.
AU - Yoshimi, R.
AU - Takahashi, K. S.
AU - Kawasaki, M.
AU - Tokura, Y.
N1 - Funding Information:
We thank T. Yokouchi, T. Ideue, Y. Okamura, N. Ogawa, S. Seki, K. Hamamoto, and N. Nagaosa for fruitful discussions, and S. Shimizu for experimental support. This research was supported by the Japan Society for the Promotion of Science through the Funding Program for World-Leading Innovative R & D on Science and Technology (FIRST Program) on Quantum Science on Strong Correlation initiated by the Council for Science and Technology Policy and by JSPS Grant-in-Aid for Scientific Research(S) No. 24224009 and No. 24226002 from MEXT, Japan.
Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/9/14
Y1 - 2016/9/14
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.117.127202
DO - 10.1103/PhysRevLett.117.127202
M3 - Article
AN - SCOPUS:84990180210
SN - 0031-9007
VL - 117
JO - Physical Review Letters
JF - Physical Review Letters
IS - 12
M1 - 127202
ER -