Spin-to-Charge Conversion in Transition-Metal-Dichalcogenide/Ferromagnet Heterostructure via Terahertz Emission Spectroscopy

ORAL

Abstract

Molybdenum disulphide (MoS2), a well-known two-dimensional transition metal dichalcogenide, has been predicted to be an ideal material for spintronics because of its excellent spin-charge conversion efficiency, which originates from its strong spin-orbit coupling. To make efficient MoS2-based spintronics devices, it is necessary to elucidate the spin-charge conversion mechanism. Using THz emission spectroscopy on MoS2/Co heterostructure, we disentangle the contributions of the inverse spin Hall effect (ISHE) and inverse Rashba Edelstein effect (IREE) to the spin-to-charge conversion. The spin Hall angle is obtained to be ~0.15, which confirms the high spin-to-charge conversion efficiency in MoS2. In addition, the temperature dependence of spin-to-charge conversion is studied, revealing the robust nature of both ISHE and IREE in MoS2.

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Presenters

  • Liang Cheng

    • Division of Physics and Applied Physics, Nanyang Technological University
    • School of Physical and Mathematical Sciences, Nanyang Technological University

Authors

  • Liang Cheng

    • Division of Physics and Applied Physics, Nanyang Technological University
    • School of Physical and Mathematical Sciences, Nanyang Technological University

  • Xinbo Wang

    • School of Physical and Mathematical Sciences, Nanyang Technological University

  • Yang Wu

    • Department of Electrical and Computer Engineering, National University of Singapore

  • Mengji Chen

    • Department of Electrical and Computer Engineering, National University of Singapore

  • Weifeng Yang

    • Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research)

  • Jian-Xin Zhu

    • Center for Integrated Nanotechnologies, Los Alamos National Laboratory
    • Los Alamos National Laboratory
    • Los Alamos National Laboratory, Theoretical Division
    • Theoretical Division, Los Alamos National Laboratory
    • Los Alamos Natl Lab

  • Justin Song

    • Nanyang Technological University
    • Division of Physics and Applied Physics, Nanyang Technological University
    • School of Physical and Mathematical Sciences, Nanyang Technological University

  • Marco Battiato

    • Institute of Solid State Physics, Vienna University of Technology

  • Shijie Wang

    • Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research)

  • Hyunsoo Yang

    • National University of Singapore
    • Department of Electrical and Computer Engineering, National University of Singapore
    • Dept. of Electrical and Computer Engineering, National Univ. of Singapore
    • Electrical and Computer Engineering, National University of Singapore

  • Ee Min Chia

    • Division of Physics and Applied Physics, Nanyang Technological University
    • School of Physical and Mathematical Sciences, Nanyang Technological University
    • Division of Physics and Applied Physics, Nanyang Tech Univ