Probing Chirality Induced Spin Selectivity in Chiral 2D Hybrid Perovskites Using Spin Hall Magnetoresistance

POSTER

Abstract

The emergence of the Chirality Induced Spin Selectivity (CISS) effect, where electron transport through chiral materials is spin filtered, offers many new and exciting opportunities for the field of spintronics. However, many questions surrounding the exact nature of this physical phenomenon still remain. Here, we employ spin Hall magnetoresistance (SHMR) measurements and use pure spin currents for probing the effective magnetic fields native to the chiral two-dimensional hybrid perovskites as predicted by the CISS effect. Chiral 2D perovskites are spin coated on top of Pt Hall bars on a Si/SiO2 substrate and the Pt resistance is measured using lock-in detection to separate the first and second harmonic dependencies as a function of magnetic field, field angle, and temperature. We find significant SHMR signals despite the lack of any ferromagnetic material, as well as exotic hysteretic behaviors that we attribute to a CISS-induced SHMR. This work helps to elucidate the mechanism of CISS and paves the way for the use of chiral hybrid perovskites for novel spintronic devices.

*Funding Acknowledgement: NC State-Nagoya Collaboration Grant. AFOSR No. FA9550-19-1-0254. NSF ECCS-193324 and ECCS-1933297. Work at Argonne was supported by the DOE, Office of Science, MSE Division.

Presenters

  • Eric Vetter

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

Authors

  • 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

  • Yuzan Xiong

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

  • Shulei Zhang

    • Materials Science Division, Argonne National Laboratory

  • Zhizhi Zhang

    • Materials Science Division, Argonne National Laboratory

  • Yi Li

    • Department of Physics, Oakland University

  • Hongwei Qu

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

  • Valentyn Novosad

    • Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division & Physics Division, Argonne Natl Lab

  • 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

  • Wei You

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

  • 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