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