Ultra-Small SrTiO<sub>3</sub> Nanoparticles: Understanding the Polar Phases and Possible Ferrroelectricity

ORAL

Abstract

Previous work revealed that 10 nm SrTiO3 (STO) nanoparticles host a polar and possibly ferroelectric phase stable under high pressure and over a broad range of temperatures. In this work, a full range of free standing nanoparticle samples between 2 and 60 nm have been studied and compared to bulk STO. Detailed structural and optical measurements are used to explore the evolution of the structure and corresponding phonon modes for varying temperatures and pressures. To understand the nature of the polar state and the existence of ferroelecricity, nonlinear optical measurements were conducted.

*This work is supported by NSF Grant No. DMR-1809931.

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Presenters

  • Milinda Abeykoon

    • Brookhaven National Laboratory
    • CMPMSD, Brookhaven National Laboratory

Authors

  • Sizhan Liu

    • New Jersey Inst of Tech
    • New Jersey Institute of Technology

  • Nathaniel Hurley

    • Stony Brook University

  • Vitali Prakapenka

    • Argonne National Laboratory
    • University of Chicago
    • Advanced Photon Source, Argonne National Laboratory
    • Center for Advanced Radiation Sources, University of Chicago, Illinois, 60637, USA
    • Advanced Photon Source - Sector-13, Argonne National Laboratory

  • Eran Greenberg

    • Argonne National Laboratory
    • University of Chicago
    • Advanced Photon Source, Argonne National Laboratory
    • Center for Advanced Radiation Sources, University of Chicago, Illinois, 60637, USA
    • Advanced Photon Source - Sector-13, Argonne National Laboratory

  • Zhenxian Liu

    • Brookhaven National Laboratory
    • C&EE Department, George Washington University
    • George Washington University
    • Brookhaven National Lab

  • Milinda Abeykoon

    • Brookhaven National Laboratory
    • CMPMSD, Brookhaven National Laboratory

  • Stanislaus S Wong

    • Stony Brook University

  • Trevor Tyson

    • New Jersey Inst of Tech
    • New Jersey Institute of Technology