Quantum Confinement in the Topological Semimetal Bi­<sub>4</sub>Se<sub>3</sub>

POSTER

Abstract

Quantum confinement of the topological semimetal Bi4Se3 was observed as a giant enhancement of the optical bandgap in two characteristic length-reducing regimes: ultra-thin films and nanoplatelets. The films were prepared via DC magnetron sputtering and characterized using atomic force microscopy and ultraviolet-visible spectroscopy. Current work investigates correlations of reduced dimensionality to enhancements of the bandgap. By characterizing the dimensionality through microscopy, spectroscopy results can be mapped to changes in the band edge as determined through Tauc plots.

Presenters

  • Margaret Brown

    • Department of Physics, University of Dayton
    • Department of Physics, University of Dayton, Dayton, OH

Authors

  • Margaret Brown

    • Department of Physics, University of Dayton
    • Department of Physics, University of Dayton, Dayton, OH

  • Ryan Laing

    • Department of Physics, University of Dayton
    • Department of Physics, University of Dayton, Dayton, OH

  • Tobin C Muratore

    • Department of Physics, University of Dayton
    • Department of Physics, University of Dayton, Dayton, OH

  • Katherine Burzynski

    • Azimuth, 2970 Presidential Dr, Suite 200, Fairborn, OH

  • Jeff Brown

    • KBR, 2601 Mission Point Blvd, Suite 300, Beavercreek, OH

  • Joseph P Corbett

    • Ohio State University
    • UES, Inc., 4401 Dayton-Xenia Rd, Dayton, OH

  • Kurt Eyink

    • Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base

  • Said Elhamri

    • Department of Physics, University of Dayton
    • Department of Physics, University of Dayton, Dayton, OH
    • Department of Physics, University of Dayton, Dayton, Ohio

  • Amber Reed

    • Air Force Research Lab - WPAFB
    • Air Force Research Lab, Wright-Patterson AFB, OH
    • Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright Patterson Air Force Base