Large Unidirectional Magnetoresistance in a Magnetic Topological Insulator

2016/09/14 by Kenji Yasuda, K. Yasuda, A. Tsukazaki +8 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electron #Fermi surface #Ferromagnetism #Graphene research and applications #Heterojunction #Magnetic field #Magnetoresistance #Magnon #Physics #Quantum mechanics #Scattering #Superconductivity #Topological Materials and Phenomena #Topological insulator #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevlett.117.127202

published as Phys. Rev. Lett. 117, 127202 (2016)

openalex publication_date 2016/09/14 · arxiv created 2016/09/19 · arxiv updated 2016/11/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We report current-direction dependent or unidirectional magnetoresistance (UMR) in magnetic or nonmagnetic topological insulator (TI) heterostructures, Cr_x(Bi_1-ySb_y)_2-xTe₃/(Bi_1-ySb_y)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.

Citations

• Giant Magnetoresistance of (001)Fe/(001)Cr Magnetic Superlattices
• Enhanced magnetoresistance in layered magnetic structures with antiferromagnetic interlayer exchange
• Topological Insulators
• Field Dependence of the Intrinsic Domain Magnetization of a Ferromagnet

Cited by

• Topological insulators-based magnetic heterostructures