Raman Scattering studies of Topological Insulators Bi$_2$Te$_3$, Bi$_2$Se$_3$, and Sb$_2$Te$_3$

ORAL

Abstract

Raman scattering spectroscopy has been used to probe the bismuth and antimony chalcogenides Bi$_2$Se$_3$, Bi$_2$Te$_3$, and Sb$_2$Te$_3$. Room temperature spectra of these topological insulators reveal new phonon modes in spectral regions not previously investigated. Polarization studies have been done to characterize these modes. New results on the temperature dependence of the Raman active phonon modes in these materials will also be presented.

*This work was supported by NSERC and Memorial University of Newfoundland.

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Authors

  • Kolawole Akintola

    • Memorial University of Newfoundland

  • Todd Andrews

    • Memorial University of Newfoundland

  • Stephanie Curnoe

    • Memorial University of Newfoundland

  • Takao Sasagawa

    • Materials and Structure Laboratory, Tokyo Institute of Technology