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Influence of plastic deformation on the structural and electronic properties of SrTiO<sub>3</sub> and KTaO<sub>3</sub>

ORAL

Abstract

Strontium titanate (SrTiO3, STO) and potassium tantalate (KTaO­3, KTO) are incipient ferroelectrics with cubic perovskite structures at room temperature. These two materials serve as excellent candidates for plastic deformation because of their outstanding ambient-temperature ductility. Recent work on plastically deformed STO has shown an enhancement of the superconducting transition temperature and the emergence of local ferroelectricity near strain-induced self-organized dislocation walls [1]. Building on this study, we present new diffuse x-ray and neutron scattering experiments as well as charge transport data aimed to investigate in more detail the influence of compressive plastic deformation on the structural and electronic properties of STO and KTO.

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Publication: [1] S. Hameed, D. Pelc, Z. W. Anderson, A. Klein, R. J. Spieker, L. Yue, B. Das, J. Ramberger, M. Lukas, Y. Liu, M. J. Krogstad, R. Osborn, Y. Li, C. Leighton, R. M. Fernandes, and M. Greven, Nat. Mater. 21, 54 (2022). https://doi.org/10.1038/s41563-021-01102-3

Presenters

  • Issam Khayr

    University of Minnesota, Twin Cities, University of Minnesota

Authors

  • Issam Khayr

    University of Minnesota, Twin Cities, University of Minnesota

  • Sajna Hameed

    Max Planck Institute for Solid State Research

  • Damjan Pelc

    Univ of Zagreb, University of Minnesota

  • Matthew J Krogstad

    Argonne National Laboratory, Advanced Photon Source, Argonne National Laboratory

  • Raymond Osborn

    Argonne National Laboratory, Material Science Division, Argonne National Laboratory

  • Yaohua Liu

    Oak Ridge National Lab, Oak Ridge National Laboratory

  • Feng Ye

    Oak Ridge National Lab, SNS, ORNL

  • Martin Greven

    University of Minnesota