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Spin to charge and charge to spin conversion in a Dirac semimetal

ORAL

Abstract

We report evidence of spin to charge and charge to spin conversion at room temperature in thin films of the archetypal three-dimensional Dirac semimetal Cd3As2 grown by molecular beam epitaxy. This has been detected by means of ferromagnetic driven spin pumping (SP) and spin torque ferromagnetic resonance (ST-FMR) in NiFe/Cd3As2 heterostructures. Analysis of the frequency and power dependence of the SP signal and of the symmetric and antisymmetric contributions to the mixing voltage in ST-FMR show that the behavior of these processes is consistent with previously reported spin to charge conversion mechanisms in heavy metals and topological insulators. Finally, we compare the efficiency of these phenomena with the one due to the inverse spin Hall effect in NiFe/Platinum bilayers.

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Presenters

  • Wilson Yanez

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

Authors

  • Wilson Yanez

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

  • Run Xiao

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

  • Jacob T Held

    University of Minnesota, Chemical Engineering and Materials Science, University of Minnesota

  • Di Xiao

    Physics, Pennsylvania State University

  • Jeffrey G Rable

    Physics, Pennsylvania State University

  • Enrique González

    Physics and Electronics, University of Puerto Rico at Humacao

  • Yongxi Ou

    Cornell University, Physics, Pennsylvania State University

  • Anthony R. Richardella

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

  • K. Andre Mkhoyan

    University of Minnesota, Chemical Engineering and Materials Science, University of Minnesota

  • Nitin Samarth

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