Infrared study of the metal-insulator transition regime in vanadium dioxide

ORAL

Abstract

Vanadium dioxide (VO$_{2})$ undergoes a metal-insulator transition at T$_{c} \quad \approx $ 340 K. The transition region of a VO$_{2}$ film has been studied with infrared ellipsometry and near-normal incidence reflectance between 40 cm$^{-1}$ and 5000 cm$^{-1}$. The measured optical constants are compared to calculations based on effective medium theories. The anomalies in the frequency and temperature dependence of the optical constants will be presented. The implications of the data for the mechanism of the metal-insulator transition will be discussed.

*This work has been supported by US Department of Energy and ETRI.

–

Authors

  • M. M. Qazilbash

    • Physics Department, University of California - San Diego

  • B. G. Chae

    • IT Convergence and Components Lab, ETRI, Daejeon, Korea

  • Hyun-Tak Kim

    • IT Convergence and Components Lab, ETRI, Daejeon, Korea

  • Dmitri Basov

    • Department of Physics, University of California San Diego
    • University of California, San Diego
    • Physics Department, University of California - San Diego
    • UCSD