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