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Optimizing magnetic dopants in ferroelectrics for defect-based qubits

ORAL

Abstract

Introducing magnetic dopants to ferroelectric crystals provides unpaired spins with coupled electrical and magnetic properties that could be utilized in a novel spin-oxide qubit platform. Depending on the symmetry of the ferroelectric host, the spins preferentially align relative to the polar axis and follow manipulation of the polar axis by an applied electric field. We demonstrate this electric-field control by a combined first-principles and electron paramagnetic resonance study of the model system Fe3+-doped PbTiO3. We further explore ferroelectric oxide systems with reduced symmetry, alternative dopants and lattice modifications to optimize the magnetoelectric coupling and understand spin-lattice decoherence channels. These results demonstrate the manipulation of spins by an electric field and the options available for optimizing spin control by tailoring the atomic environment.

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Presenters

  • Katherine Inzani

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

Authors

  • Katherine Inzani

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

  • Weichuan Huang

    University of California Berkeley

  • Junjie Liu

    University of Oxford

  • Valentin V. Laguta

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

  • Sujit Das

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

  • Ruchira Chatterjee

    Lawrence Berkeley National Lab

  • Nima Leclerc

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

  • Evan Sheridan

    Lawrence Berkeley National Lab

  • Arzhang Ardavan

    University of Oxford, Department of Physics, University of Oxford

  • 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

  • Sinéad Majella Griffin

    Lawrence Berkeley National Laboratory, Lawrence Berkeley National Lab