Negative Static Dielectric Constant Under Electrical Field

ORAL

Abstract

We report the sign change of the dielectric constant ($\epsilon^\prime$) for the Ba-Ti-O based giant electrorheological (ER) fluid under the electrical field ($E$) up to 5 kV/mm. The data that extend to low frequency suggest that the static $\epsilon^\prime$ changes from positive to negative under the dc bias. Models that were suggested for the left-handed materials (LHM), e.g. resonance models and plasmon models, are examined. Our analysis suggests that the self- assembled nanostructures under the electrical field and a large suppression of carrier collisions play key roles. The great potential for application of this phenomena will be discussed.

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Authors

  • F. Chen

  • Stephen Tsui

  • Jason Shulman

  • Y. Y. Xue

    • Texas Center for Superconductivity and Advanced Materials, University of Houston

  • C.W. Chu

    • Texas Center for Superconductivity and Advanced Materials, University of Houston, Houston, TX 77204-5002
    • Hong Kong University of Science and Technology; Texas Center for Superconductivity, University of Houston; Lawrence Berkeley National Laboratory
    • Dept. of Physics and TcSUH, University of Houston, Houston,TX 77204-5002
    • Department of Physics and TCSAM, University of Houston

  • W. J. Wen

    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong