Temperature and Pressure Dependent Properties of A3Ti2O7

ORAL

Abstract

Theoretical models of the A3Ti2O7 system suggest that electric polarization is due to the combination of the coherent TiO6 octahedral rotation and tilting, both being nonpolar. For the doped A3Ti2O3 systems, different size atoms enable the possibility of site-selective substitution in A’ or A site to tune the TiO6 octahedral rotation and tilting. In this work, a structural study over a broad range of temperatures and pressures has been conducted by x-ray diffraction, Raman spectroscopy, x-ray absorption spectroscopy, x-ray pair distribution function measurements and DFT modeling. The long-range and local symmetries and local atomic and electronic structural changes will be discussed and compared with previous work.

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

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Presenters

  • Sizhan Liu

    • New Jersey Inst of Tech

Authors

  • Sizhan Liu

    • New Jersey Inst of Tech

  • Eli Stavitski

    • Brookhaven National Laboratory

  • Zhenxian Liu

    • Brookhaven National Laboratory
    • Civil and Environmental Engineering, The George Washington University

  • SuYin Wang

    • Argonne National Laboratory

  • Yu-Sheng Chen

    • Argonne National Laboratory

  • Bin Gao

    • Rutgers University

  • Jaewook Kim

    • Rutgers University

  • Sang-Wook Cheong

    • Rutgers University
    • R-CEM & Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers Center for Emergent Materials, Rutgers University
    • Department of Physics and Astronomy, Center for Emergent Materials, Rutgers University; Max Planck POSTECH/Korea Research Initiative, Pohang University of Science and Technol
    • Physics and Astronomy, Rutgers University
    • Rutgers University, Physics and Astronomy, and Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
    • Rutgers University, Piscataway
    • Department of Physics and Astronomy, Rutgers University, New Brunswick
    • Department of Physics and Astronomy, Rutgers University
    • Department of Physics, Rutgers University
    • Physics & Astronomy, Rutgers University
    • Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University
    • Rutgers University, New Brunswick
    • Physics, Rutgers University
    • Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA

  • Sanjit Ghose

    • Brookhaven National Laboratory
    • Brookhaven National Laboratory’

  • Trevor Tyson

    • New Jersey Inst of Tech