Signatures of an order-disorder transition in LiOsO3 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