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Electric field control of single spins in oxide ferroelectric hosts

ORAL

Abstract

Despite the successful scaling of CMOS transistor gate lengths below 10 nm, there has been a corresponding increase in losses as we approach the Boltzmann limit of current control. This problem is a fundamental attribute of devices operating with charge control, but exploiting materials which facilitate the control of single spins opens an avenue to avoid parasitic losses with diminishing feature sizes. We investigate the voltage control of individual spins in magnetically-doped complex oxides as a possible candidate for a CMOS replacement. We show, using first-principles calculations, that electric-field controlled polarization in ferroelectric oxides couples to dopant spins through spin-orbit coupling resulting in an observable magnetization response. Using an in house codebase, we compute the magnetocrystalline anisotropy energy (MCAE) surface and extract the anisotropy constants in Fe and Mn-doped PbTiO3 and Bi2WO6. We predict the spin moment’s dependence on electric-field and present ferroelectric switching pathways that can be used for manipulation. We compare our results with electron paramagnetic resonance measurements of single-spin MCAEs and find they compare favorably with our predictions.

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Presenters

  • Nima Leclerc

    Lawrence Berkeley National Lab, Materials Science and Engineering, University of Pennsylvania

Authors

  • Nima Leclerc

    Lawrence Berkeley National Lab, Materials Science and Engineering, University of Pennsylvania

  • Katherine Inzani

    Lawrence Berkeley National Laboratory, Lawrence Berkeley National Lab, Molecular Foundry and Materials Sciences Divisions, Lawrence Berkeley National Laboratory

  • Sujit Das

    University of California, Berkeley, University of California Berkeley, UC Berkeley

  • Valentin V. Laguta

    Institute of Physics, Czech Academy of Sciences, Czech Academy of Sciences

  • Arzhang Ardavan

    University of Oxford, Department of Physics, University of Oxford

  • Nabaraj Pokhrel

    UC Merced, University of California, Merced

  • Elizabeth A Nowadnick

    UC Merced, University of California, Merced

  • Ramamoorthy Ramesh

    materials science and engineering, university of california berkeley, University of California, Berkeley, University of California Berkeley, UC Berkeley, Department of Materials Science and Engineering, University of California Berkley

  • Sinead Griffin

    Lawrence Berkeley National Laboratory, Molecular Foundry and Materials Sciences Divisions, Lawrence Berkeley National Laboratory