Electrically tunable quantum anomalous Hall effect in graphene decorated by $5d$ transition-metal adatoms

ORAL

Abstract

Based on first-principles calculations, we predict that $5d$ transition-metals on graphene present a unique class of hybrid systems exhibiting topological transport effects that can be manipulated effectively by external electric fields [1]. The origin of this phenomenon lies in the exceptional magnetic properties and the large spin-orbit interaction of the $5d$ metals leading to significant magnetic moments accompanied with colossal magnetocrystalline anisotropy energies. A strong magneto-electric response is predicted that offers the possibility to switch the spontaneous magnetization direction by moderate electric fields, enabling an electrically tunable quantum anomalous Hall effect.\\[4pt] [1] preprint: http://arxiv.org/abs/1108.5915

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Authors

  • Hongbin Zhang

    • Forschungszentrum Juelich, Germany

  • Cesar Lazo

    • Institute of Theoretical Physics and Astrophysics, University of Kiel, Germany
    • University of Kiel, Germany

  • Stefan Bl\"ugel

    • Institute for Advanced Simulation, Research Centre Juelich, Germany
    • Peter Gr\"unberg Institut and Institute for Advanced Simulation, Forschungszentrum J\"ulich and JARA, 52425 J\"ulich, Germany
    • Peter Grunberg Institut and Institute for Advanced Simulation, Forschungszentrum Juelich and JARA, 52425 Juelich, Germany
    • Peter Gr\"unberg Institut (PGI) and Institute for Advanced Simulation (IAS), Forschungszentrum J\"ulich and JARA, 52425-J\"ulich, Germany
    • Peter Gruenberg Institut (PGI-1) \& Institute for Advanced Simulation (IAS-1), Forschungszentrum Juelich and JARA, 52425 Juelich, Germany
    • Forschungszentrum Juelich, Germany

  • Stefan Heinze

    • Institute of Theoretical Physics and Astrophysics, University of Kiel, Germany
    • University of Kiel, Germany

  • Yuriy Mokrousov

    • Institute for Advanced Simulation, Research Centre Juelich, Germany
    • Forschungszentrum Juelich, Germany