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Anomalous Electronic Switching Behavior in Compressed La<sub>2</sub>S<sub>3</sub>

ORAL

Abstract

Insulator-to-metal transitions (IMT) are a hallmark of many families of quantum materials. Impulsively induced electronic phases are typically short-lived, with lifetimes on the order of the electromagnetic pulse width or the energy relaxation time of the material. Yet, in quantum materials with wrinkled free-energy landscapes, impulsive stimulation can trap the system in new metastable states and 'hidden' phases not apparent in common phase diagrams of quantum materials. Lanthanide sesquisulfides (Ln2S3) manifest unusual magnetic and electronic behavior. However, very few studies on Lanthanide sesquisulfides have been reported under pressure. In an effort to expand the understanding of La2S3, we performed Raman and resistance measurements up to 20 GPa. At low pressures between 16-18 GPa an interesting softening of the low frequency modes in the Raman was accompanied with laser driven resistance change, which provide an exciting opportunity to tune their exotic properties by impulsive stimulation harvesting metastable hidden phases of these materials.

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Presenters

  • Hiranya Pasan Vindana Wadhurawa Mudiyanselage

    Department of Physics and Astronomy, University of Rochester

Authors

  • Hiranya Pasan Vindana Wadhurawa Mudiyanselage

    Department of Physics and Astronomy, University of Rochester

  • Arnab Majumdar

    Department of Physics and Astronomy, Uppsala University

  • Elliot Snider

    Department of Mechanical Engineering, University of Rochester, Mechanical Engineering, University of Rochester

  • Nathan Dasenbrock-Gammon

    Department of Physics and Astronomy, University of Rochester, Physics and Astronomy, University of Rochester, University of Rochester

  • Raymond McBride

    Department of Mechanical Engineering, University of Rochester, Mechanical Engineering, University of Rochester, University of Rochester

  • Rajeev Ahuja

    Department of Physics and Astronomy, Uppsala University

  • Ranga P Dias

    University of Rochester, Department of Physics and Astronomy, University of Rochester, Physics and Astronomy, University of Rochester, University of Rochester, Assistant Professor of Mechanical Engineering and Physics