Spin and charge interconversion probed via spin torque ferromagnetic resonance and spin pumping in the archetypal Dirac semimetal Cd<sub>3</sub>As<sub>2</sub>

ORAL

Abstract

We report spin-to-charge and charge-to-spin conversion at room temperature in heterostructures of the archetypal Dirac semimetal Cd3As2 and Ni80Fe20, detected by both spin torque ferromagnetic resonance and ferromagnetic driven spin pumping. Analysis of the symmetric and antisymmetric components to the mixing voltage in spin torque ferromagnetic resonance and the frequency and power dependence of the spin pumping signal show that the behavior of these processes is consistent with previously reported spin-to-charge interconversion mechanisms in heavy metals, topological insulators and Weyl semimetals. We find that the efficiency of these phenomena is comparable to that due to the spin Hall effect in heavy metals. Finally, we compare our results with first principles calculations.

*This work is supported by SMART/nCORE/SRC/NIST, the Institute for Quantum Matter under DOE EFRC grant DE-SC0019331, 2DCC-MIP/NSF DMR-1539916, UMN/MRSEC/NSF DMR-1420013 and the Office of Graduate Educational Equity Programs and Eberly College of Science at The Pennsylvania State University.

–

Presenters

  • Wilson Yanez

    • Pennsylvania State University
    • Physics, Pennsylvania State University

Authors

  • Wilson Yanez

    • Pennsylvania State University
    • Physics, Pennsylvania State University

  • Yongxi Ou

    • Physics, The Pennsylvania State University
    • Physics, Pennsylvania State University

  • Run Xiao

    • Pennsylvania State University
    • Physics, Pennsylvania State University

  • Jacob T Held

    • Chemical engineering and materials science, University of Minnesota

  • Jahyun Koo

    • Weizmann Institute of Science
    • Physics, Weizmann institute of science

  • Timothy S Pillsbury

    • Pennsylvania State University
    • Physics, The Pennsylvania State University
    • Physics, Pennsylvania State University
    • The Pennsylvania State University

  • Jeffrey Rable

    • Pennsylvania State University
    • Physics, The Pennsylvania State University
    • Physics, Pennsylvania State University

  • Di Xiao

    • Department of Physics, The Pennsylvania State University
    • Physics, Pennsylvania State University

  • Enrique Onelle Gonzalez

    • Physics and electronics, Humacao campus of the university of Puerto Rico

  • Anthony R. Richardella

    • Pennsylvania State University
    • Physics, The Pennsylvania State University
    • The Pennsylvania State University
    • Physics, Pennsylvania State University

  • K. A. Mkhoyan

    • Chemical engineering and materials science, University of Minnesota
    • Department of Chemical Engineering and Materials Science, University of Minnesota

  • Binghai Yan

    • Weizmann Institute of Science
    • Physics, Weizmann institute of science

  • Nitin Samarth

    • Pennsylvania State University
    • Department of Physics, The Pennsylvania State University
    • Physics, The Pennsylvania State University
    • Physics, Pennsylvania State University
    • The Pennsylvania State University