Proximity-Induced Tunneling Anisotropic Magnetoresistance: Massive vs. Massless States

ORAL

Abstract

We study the tunneling anisotropic magnetoresistance (TAMR) in the system of a magnetic barrier on top of two-dimensional electron gas (2DEG) with proximity-induced exchange splitting and Rashba spin-orbit coupling. Both numerical simulations and complementary model calculations show that TAMR is less than 2% in most of the cases. However, a relatively large TAMR (~10%) occurs at certain gate voltages and magnetizations. By analyzing Fermi contours in the barrier and lead, we give an explanation on the origin of this large TAMR. A comparison between TAMR in 2DEG and topological insulators (TI) is given, which can be used to experimentally distinguish signals from trivial and nontrivial states in TI.

*US ONR N000141712793

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Presenters

  • Timothy Leeney

    • Physics, State Univ of NY - Buffalo

Authors

  • Chenghao Shen

    • Physics, State Univ of NY - Buffalo

  • Timothy Leeney

    • Physics, State Univ of NY - Buffalo

  • Alex Matos Abiague

    • SUNY Buffalo
    • Department of Physics & Astronomy, Wayne State University
    • Department of Physics and Astronomy, Wayne State University
    • Physics, Wayne State University

  • Benedikt Scharf

    • Universität Würzburg
    • Physics, University of Würzburg

  • Jong E Han

    • Physics, State Univ of NY - Buffalo
    • State Univ of NY - Buffalo
    • Department of Physics, State Univ of NY - Buffalo

  • Igor Zutic

    • State Univ of NY - Buffalo
    • Physics, State Univ of NY - Buffalo
    • SUNY Buffalo
    • Department of Physics, University at Buffalo
    • University at Buffalo
    • Department of Physics, University at Buffalo, State University of New York
    • Department of Physics, State Univ of NY - Buffalo