Spintronic Terahertz Emission by Ultrafast Spin-Charge Current Conversion in Reduced Dimensional Organic-Inorganic Hybrid Perovskites

ORAL

Abstract

Reduced Dimensional Hybrid Metal Halides (RD-HMHs) are a new class of synthetic semiconductor prepared via low-temperature solution processing with a wide array of possible chemical and structural arrangements enabled by the versatility of their molecular cations. RD-HMHs have already been shown to possess remarkable photovoltaic, excitonic, and optoelectronic properties, but their rich spintronic functionalities have yet to be utilized. We report the successful observation of the inverse Rashba-Edelstein Effect (IREE) in a 2D HMH (BA)2(MA)n-1PbnI3n+1 driven by spin pumping from an adjacent ferromagnetic Ni81Fe19 layer using femtosecond laser pulses. We observed spin-dependent THz radiation at room temperature. The phase of the THz field can be controlled by means of an external magnetic field. Circular polarization dependence of the THz radiation confirms the helicity-dependent directional THz radiation and reveals the Rashba states in the RD-HMH materials. This work opens the door for next generation, low-cost THz emitters with tunable functionalities.

*We acknowledge funding from: NSF under ECCS-1933297, DOE and AFOSR under No. FA9550-19-1-0254, DOE under No. DE-AC02-06CH11357, NSF under No. 193324, and DOE, MSE Division, contract no. DE-SC0012509.

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Presenters

  • Eric Vetter

    • North Carolina State University, Department of Physics
    • Physics, North Carolina State University
    • North Carolina State University

Authors

  • Kankan Cong

    • Advanced Photon Source, Argonne National Laboratory

  • Eric Vetter

    • North Carolina State University, Department of Physics
    • Physics, North Carolina State University
    • North Carolina State University

  • Yan Liang

    • Department of Chemistry, University of North Carolina at Chapel Hill

  • Yi Li

    • Department of Physics, Oakland University

  • Qi Zhang

    • University of Washington
    • Advanced Photon Source, Argonne National Laboratory

  • Yuzan Xiong

    • Department of Physics, Oakland University
    • Electronic and Computer Engineering, Oakland University

  • Hongwei Qu

    • Department of Electronic and Computer Engineering, Oakland University
    • Electronic and Computer Engineering, Oakland University

  • Richard D Schaller

    • Department of Chemistry, Northwestern University
    • Center for Nanoscale Materials, Argonne National Laboratory
    • Advanced Photon Source, Argonne National Laboratory

  • Axel Hoffmann

    • University of Illinois
    • Materials Science and Engineering, University of Illinois at Urbana Champaign
    • Argonne National Laboratory
    • University of Illinois Urbana-Champaign
    • University of Illinois at Urbana-Champaign
    • Materials Science and Engineering, University of Illinois at Urbana-Champaign
    • Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
    • Materials Science Division, Argonne National Laboratory
    • Argonne Natl Lab

  • Alexander F Kemper

    • Department of Physics, North Carolina State University
    • North Carolina State University
    • Physics, North Carolina State University

  • Wei You

    • Department of Chemistry, University of North Carolina at Chapel Hill
    • University of North Carolina at Chapel Hill

  • Haidan Wen

    • Argonne National Laboratory
    • Advanced Photon Source, Argonne National Laboratory, Argonne, IL, USA
    • Advanced Photon Source, Argonne National Laboratory

  • Wei Zhang

    • Oakland University
    • Physics, Oakland University
    • Department of Physics, Oakland University
    • Electronic and Computer Engineering, Oakland University

  • Dali Sun

    • North Carolina State University, Department of Physics
    • Physics, North Carolina State University
    • North Carolina State University