Electrical control of phase transitions through ion transfer in oxide superlattices

ORAL

Abstract

Electrical control of phase transitions through ion transfer has been of great interest recently. Ion transfer can have a dramatic influence on a material’s electronic, magnetic and optical properties, and thereby provides a powerful tool for fundamental research and enables many practical applications. However only a few materials have been found to exhibit significant tunability and good reversibility of electrically controlled ion transfer. In this talk, we show that superlattices comprised of the 5d oxide SrIrO3 and 3d oxide La1-xSrxMnO3 exhibit a reversible phase change under ionic liquid gating. Ionic liquid gating modulates the lattice constant by seven percent and modifies the valence of both Mn and Ir cations. The gate voltage induces a reversible transition between a ferromagnetic metallic state and a nonmagnetic insulating state, along with a large modulation of optical transmittance. Secondary ion mass spectrometry indicates that these reversible transitions are mediated by the transfer of hydrogen and oxygen ions in the superlattices. Single layer films of the constituent materials do not exhibit such significant changes in properties. Our study shows that the electrically controlled ion transfer can be engineered by designing materials at the atomic scale.

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Presenters

  • Di Yi

    • Stanford University

Authors

  • Di Yi

    • Stanford University

  • Yujia Wang

    • Tsinghua University

  • Hongtao Yuan

    • Nanjing University

  • Olaf M Van T Erve

    • US Naval Research Laboratory
    • Naval Research Laboratory
    • United States Naval Research Laboratory

  • Michael Veit

    • Stanford University

  • Purnima Balakrishnan

    • Stanford University

  • Yongseong Choi

    • Argonne National Laboratory
    • Advanced Photon Source, Argonne National Laboratory
    • Advanced Photon Source
    • Argonne National Lab

  • Alpha N'Diaye

    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA

  • Padraic Shafer

    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source

  • Elke Arenholz

    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source

  • Berend Jonker

    • US Naval Research Laboratory
    • Naval Research Lab
    • Naval Research Laboratory
    • Materials Science and Technology Division, U.S. Naval Research Laboratory
    • United States Naval Research Laboratory

  • Pu Yu

    • State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, and Collaborative Innovation Center of Quantum Matter, Beijing, China; an
    • Tsinghua University

  • Yuri Suzuki

    • Stanford University
    • Department of Applied Physics, Stanford University
    • Applied Physics, Stanford University
    • Geballe Laboratory for Advanced Materials, Stanford University