Magnetize Topological Surface States of Bi2Se3 with a CrI3 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.

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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