Magnon-assisted tunnelling in van der Waals heterostructures based on CrBr 3

ORAL

Abstract

Recently, the family of two-dimensional materials has been expanded to include ferromagnets. It was shown that CrI3 exhibits ferromagnetism down to thicknesses of a single monolayer [Huang, B. et al. Nature 546, 270 (2017)]. CrI3 is part of a group of materials known as the chromium trihalides, CrX3 (where X=Cl, Br or I). I will report on a few layers of exfoliated CrBr3 (2-6 layers) that are also ferromagnetic by fabricating and characterising functional tunnelling devices where the CrBr3 layer is sandwiched in between two graphene electrodes. I will also report a new type of tunnelling mechanism in van der Waals heterostructures by demonstrating that electrons in our device tunnel between the graphene layers via the emission (and, at high temperature, absorption) of magnons in the CrBr3 barrier.

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Presenters

  • Davit Ghazaryan

    • Department of Physics, National Research University Higher School of Economics

Authors

  • Davit Ghazaryan

    • Department of Physics, National Research University Higher School of Economics

  • Mark Greenaway

    • Department of Physics, Loughborough University

  • Zihao Wang

    • Physics and Astronomy, The University of Manchester
    • School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK

  • Ivan Jesus Vera Marun

    • Physics and Astronomy, The University of Manchester
    • School of Physics and Astronomy, University of Manchester

  • Jun Yin

    • School of Physics and Astronomy, University of Manchester
    • School of physics and astronomy, the University of Manchester
    • Physics and Astronomy, The University of Manchester

  • Serge Morozov

    • Institute of Microelectronics Technology and High Purity Materials

  • Alexander Lichtenstein

    • Institute of Theoretical Physics,, University Hamburg

  • Mikhail Katsnelson

    • Theory of Condensed Matter, Radboud University
    • Institute for Molecules and Materials,, Radboud University
    • Radboud University

  • Artem Mishchenko

    • School of Physics and Astronomy, University of Manchester
    • School of physics and astronomy, the University of Manchester
    • Physics and Astronomy, The University of Manchester
    • School of Physics & Astronomy, University of Manchester

  • Laurence Eaves

    • Physics and Astronomy, The University of Manchester

  • Andre Geim

    • School of physics and astronomy, the University of Manchester
    • Physics and Astronomy, The University of Manchester
    • School of Physics & Astronomy, University of Manchester
    • School of Physics, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom

  • Kostya Novoselov

    • School of physics and astronomy, the University of Manchester
    • Physics and Astronomy, The University of Manchester
    • School of Physics and Astronomy, University of Manchester
    • School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK

  • Abhishek Misra

    • Physics and Astronomy, The University of Manchester