Signatures of an order-disorder transition in LiOsO<sub>3</sub> from second harmonic optical anisotropy

ORAL

Abstract

Metallic LiOsO3 undergoes an unusual ferroelectric-like structural phase transition below Tc = 140 K that is believed to realize the first example of the long-sought Anderson-Blount ferroelectric metal. However, the microscopic origin of this phase transition remains unsettled. In this talk I will present optical second harmonic generation rotation anisotropy measurements on LiOsO3 single crystals to probe the presence of both static and dynamic inversion symmetry breaking. Our results reveal a strong order-disorder character to the 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

    • University of Geneva
    • California Institute of Technology
    • Department of Physics, California Institute of Technology

  • Liuyan Zhao

    • University of Michigan
    • Physics Department, Univ of Michigan - Ann Arbor
    • Univ of Michigan - Ann Arbor
    • Department of Physics, University of Michigan

  • Cameron Dashwood

    • Department of Physics, California Institute of Technology

  • Youguo Shi

    • Insititute of Physics, Chinese Academy of Scienes (CAS)
    • Chinese Academy of Sciences
    • Chinese Academy of Scienes (CAS)
    • Institute of Physics,Chinese Academy of Scienes (CAS)
    • Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    • Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

  • David Hsieh

    • Institute for Quantum Information and Matter, Caltech
    • Department of Physics, California Institute of Technology
    • California Institute of Technology
    • Institute For Quantum Information and Matter, California Institute of Technology