Pressure-induced B1-to-B2 phase transition in AgSbSe$_2$

ORAL

Abstract

We have investigated the pressure-induced B1-to-B2 phase transitions in AgSbSe$_{2}$. High pressure x-ray diffraction experiments clearly show that the process starts at 20 GPa and completes at 55 GPa. Our density-functional calculations are in good agreement with the experiment and confirm the B1 to B2 transition which is similar to AgSbTe$_{2}$. The possible intermediate structure for B1-to-B2 transition in AgSbSe$_{2}$ occurring at 21-54 GPa is under investigation. Its similarity and difference to AgSbTe$_{2}$ will be discussed in this study.

*The UNLV High Pressure Science and Engineering Center was supported by the U.S. Department of Energy, National Nuclear Security Administration, under Cooperative Agreement DE-FC08-01NV14049.

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Authors

  • Eunja Kim

  • Ravhi Kumar

    • HiPSEC and Department of Physics, University of Nevada Las Vegas, Las Vegas, Nevada

  • Andrew Cornelius

    • HiPSEC and Dep.Physics, University of Nevada Las Vegas
    • University of Nevada, Las Vegas

  • Malcolm Nicol

    • Department of Physics and High Pressure Science and Engineering Center, University of Nevada, Las Vegas, NV 89154
    • HiPSEC and Dep.Physics, University of Nevada Las Vegas, Las Vegas, Nevada
    • High Pressure Science and Engineering Center, Department of Physics, University of Nevada Las Vegas, Las Vegas, NV 89154-4002, USA.
    • HiPSEC, Department of Physics, University of Nevada Las Vegas, Las Vegas NV 89154-4002