First-principles study of polarized Raman spectra of few-layer IV-VI compounds (GeS, GeSe, SnS, and SnSe)

ORAL

Abstract

IV-VI compounds such as GeS, GeSe, SnS, and SnSe are layered compounds with weak interlayer interactions and have attracted recent attention due to their interesting thermoelectric and optoelectronic properties. In this talk, we will present our recent comparative study of the polarized Raman spectra of few-layer MX (with M$=$Ge and Sn, and X$=$S and Se) based on density-functional theory. Possible effects of strain and phase transitions on the Raman response will be compared with available experimental data.

*This work is supported by the SET grant of the Fisher College of Science and Mathematics (FCSM) at the Towson University.

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Authors

  • Jia-An Yan

    • Department of Physics, Astronomy and Geosciences, Towson University
    • Department of Physics, Astronomy and Geosciences, Towson University, 8000 York Road, Towson, MD 21252
    • Towson University

  • Lucas Webster

    • Department of Physics, Astronomy and Geosciences, Towson University, 8000 York Road, Towson, MD 21252

  • David Houston

    • Department of Physics, Astronomy and Geosciences, Towson University, 8000 York Road, Towson, MD 21252

  • Danna Doratotaj

    • Department of Physics, Astronomy and Geosciences, Towson University, 8000 York Road, Towson, MD 21252