Terahertz conductivity of Bi$_2$Se$_3$ topological insulator thin films

POSTER

Abstract

We report a study of high quality MBE grown Bi$_2$Se$_3$ topological insulator thin films. We have measured the ac conductivity in the terahertz region using time domain terahertz spectroscopy. By measuring films with different thickness we can set limits on the value of the bulk and surface conductivites. We will also report on measurements of the Faraday rotation using polarized light at these frequencies.

*Work supported by The Institute of Quantum Matter under DOE grant DE-FG02-08ER46544 and by the Gordon and Betty Moore Foundation.

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Authors

  • Rolando Valdes Aguilar

    • Johns Hopkins University

  • L.S. Bilbro

    • Department of Physics \& Astronomy, Johns Hopkins University, Baltimore, MD 21218

  • N. Bansal

  • Y-S. Kim

  • S. Oh

    • Department of Physics \& Astronomy, Rutgers University, Piscataway, NJ 08854

  • C. Chang

  • Y. Zhang

  • K. He

  • X. Ma

    • Institute of Physics, The Chinese Academy of Sciences, Beijing, 100190, P.R. China

  • X. Zhu

  • Q-K. Xue

    • Department of Physics, Tsinghua University, Beijing, 100084, P. R. China

  • N.P. Armitage

    • Department of Physics \& Astronomy, Johns Hopkins University, Baltimore, MD 21218