Polar State in Freestanding Strontium Titanate Nanoparticles

ORAL

Abstract

Monodispersed strontium titanate nanoparticles were prepared and studied in detail. It is found that $\sim$ 10 nm as-prepared stoichiometric nanoparticles are in a polar structural state (with possibly ferroelectric properties) over a broad temperature range. A tetragonal structure, with possible reduction of the electronic hybridization is found as the particle size is reduced. In the 10 nm particles, no change in the local Ti-off centering is seen between 20 and 300 K. This work is supported by DOE Grant DE-FG02-07ER46402.

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Authors

  • Trevor Tyson

    • New Jersey Institute of Technology

  • Tian Yu

    • New Jersey Institute of Technology

  • Mark Croft

    • Rutgers University

  • Megan Scofield

    • State University of New York at Stony Brook

  • Dara Bobb-Semple

    • State University of New York at Stony Brook

  • Jing Tao

    • Brookhaven National Laboratory

  • Cherno Jaye

    • National Institute of Standards and Technology

  • Daniel Fischer

    • National Institute of Standards and Technology

  • Stanislaus Wong

    • State University of New York at Stony Brook