Subtle structural distortions in LiOsO3 observed using optical second harmonic generation

ORAL

Abstract

LiOsO3 is a metal that undergoes a non-polar to polar structural phase transition upon cooling below a critical temperature Tc ~ 140 K, which is unusual because the presence of itinerant carriers is usually incompatible with ferroelectric-like structural distortions. To explore the microscopic mechanism of this phase transition, we performed angle-of-incidence dependent optical second harmonic rotational anisotropy measurements on LiOsO3 single crystals. We observe subtle distortions in the paraelectric phase above Tc and I will discuss their implications for an order-disorder versus a displacive picture of the polar phase transition.

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Presenters

  • Jun-Yi Shan

    Department of Physics, California Institute of Technology

Authors

  • Jun-Yi Shan

    Department of Physics, California Institute of Technology

  • Alberto De la Torre

    Department of Quantum Matter Physics, University of Geneva, Department of Physics, California Institute of Technology, Caltech

  • Nicholas Laurita

    Johns Hopkins University, Institute for Quantum Information and Matter, California Institute of Technology, Caltech, Department of Physics, California Institute of Technology

  • Liuyan Zhao

    Department of Physics, University of Michigan, University of Michigan, University of Michigan, Ann Arbor

  • Cameron Dashwood

    Department of Physics, California Institute of Technology

  • Danilo Puggioni

    Northwestern University, Materials Science and Engineering, Northwestern University, Department of Materials Science and Engineering, Northwestern University

  • Kazunari Yamaura

    National Institute for Materials Science, Research Center for Functional Materials, National Institute for Materials Science, Superconducting Properties unit, National Institute for Materials Science

  • Youguo Shi

    Institute of Physics, Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Chinese Academy of Sciences, Institute of Physics

  • James M Rondinelli

    Northwestern University, Northwestern university, Department of Materials Science and Engineering, Northwestern Univ, Materials Science and Engineering, Northwestern University, Department of Materials Science and Engineering, Northwestern University

  • David Hsieh

    California Institute of Technology, Institute for Quantum Information and Matter, California Institute of Technology, Caltech, Caltech, Physics, Math & Astronomy, Physics, California Institute of Technology, Department of Physics, California Institute of Technology