Giant spin Hall effect in two-dimensional monochalcogenides

ORAL

Abstract

One of the most exciting properties of two dimensional materials is their sensitivity to external tuning of the electronic properties, for example via electric field or strain. Recently discovered analogues of phosphorene, group-IV monochalcogenides (MX with M = Ge, Sn and X = S, Se, Te), display several interesting phenomena related to the in-plane strain, such as giant piezoelectricity and multiferroicity, which combines ferroelastic and ferroelectric properties. Here, using calculations from first principles, we predict for the first time giant spin Hall effect (SHE) in these materials which suggests their high potential for 2D spintronics. We reveal that the spin Hall conductivity is tunable via combinations of external strain and doping. In some configurations, the strain-induced semiconductor to metal transition enables the logic functionality of switch on/off control of spin currents indicating a new route for the design of multi-tunable spintronics devices.

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Presenters

  • Jagoda Slawinska

    Department of Physics, University of North Texas, University of North Texas

Authors

  • Jagoda Slawinska

    Department of Physics, University of North Texas, University of North Texas

  • Frank T Cerasoli

    Department of Physics, University of North Texas

  • Haihang Wang

    Department of Physics, University of North Texas, University of North Texas

  • Sara Postorino

    Dipartimento di Fisica, Università di Roma Tor Vergata

  • Andrew Supka

    Department of Physics and Science of Advanced Materials Program, Central Michigan University

  • Stefano Curtarolo

    Materials Science, Electrical Engineering, Physics and Chemistry, Duke University, Mechanical Engineering and Materials Science, Duke University, Materials Science and Engineering, Center for Materials Genomics, Duke University, Durham, NC, Center for Materials Genomics, Duke University, Duke University, Department of Mechanical Engineering and Materials Science, Duke University, Materials Science, Electrical Engineering, Physics and Chemistry, Duke University, Durham, NC, USA

  • Marco Fornari

    Department of Physics and Science of Advanced Materials, Central Michigan University, Mt. Pleasant, MI, Department of Physics and Science of Advanced Materials Program, Central Michigan University, Mt. Pleasant, MI, USA, Department of Physics and Science of Advanced Materials Program, Central Michigan University

  • Marco Buongiorno Nardelli

    Department of Physics, University of North Texas