Magnetize Topological Surface States of Bi<sub>2</sub>Se<sub>3</sub> with a CrI<sub>3</sub> Monolayer

ORAL

Abstract

To magnetize surfaces of topological insulators without damaging their topological feature is a crucial step for the realization of the quantum anomalous Hall effect (QAHE), and still remains as a challenging task. Through density functional calculations, we found that adsorption of a semiconducting two-dimensional van der Waals (2D-vdW) ferromagnetic CrI3 monolayer can create a sizable spin splitting at the Dirac point of the topological surface states of Bi2Se3 films. Furthermore, general rules that connect different quantum and topological parameters are established through model analyses. This work provides a useful guideline for the realization of QAHE at high temperature in heterostructures of 2D-vdW magnetic monolayers and topological insulators.

*Work was supported by DOE-BES (Grant No. DE-FG02-05ER46237). Density functional theory calculations were performed on parallel computers at NERSC supercomputer centers.

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Presenters

  • Ruqian Wu

    • University of California, Irvine
    • Department of Physics and Astronomy, University of California, Irvine, CA, United States
    • Fudan University
    • Department of Physics and Astronomy, University of California, Irvine

Authors

  • YUSHENG HOU

    • University of California, Irvine
    • Department of Physics and Astronomy, University of California, Irvine

  • Jeongwoo Kim

    • Department of Physics, Ulsan National Institute of Science and Technology

  • Ruqian Wu

    • University of California, Irvine
    • Department of Physics and Astronomy, University of California, Irvine, CA, United States
    • Fudan University
    • Department of Physics and Astronomy, University of California, Irvine