Insulator-metal transition of highly compressed cerium sulfide

ORAL

Abstract



We have studied room temperature electrical resistance and the Raman spectra of Ce2S3 up to pressures of 60 GPa as well as low temperature electrical resistance. Three phase transitions were observed at room temperature at 15 and 25 GPa based on changes in Raman spectra. The initial transitions are followed by and insulator to metal transition at 40 GPa, determined by a seven order of decrease in electrical resistance, the disappearance of Raman modes, and the change in appearance from opaque to reflective. The temperature dependence electrical resistance measurements support the conclusion that Ce2S3 is an insulator at low pressures and a metal above 40 GPa.

*This research was supported by NSF, Grant No. DMR-1809649, and DOE Stockpile Stewardship Academic Alliance Program, Grant No. DE-NA0003898.

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Presenters

  • Raymond McBride

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

Authors

  • Raymond McBride

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

  • 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