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The energy gaps of fullerene C60 and C70 determined from the temperature dependent microwave conductivity

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Zeitschrift für Physik B Condensed Matter

Abstract

The dielectric constants\(\tilde \varepsilon = \varepsilon ' + i\varepsilon ''\) of C60 and C70 powders have been measured in the temperature range from 150 K to 900 K using a microwave absorption method. From the temperature dependence of ε′′ the “electrical” band gaps are found to be 1.86±0.1 eV for C60 and 1.57±0.1 eV for C70. Our method is not influenced by the possible generation of excitons. The results are discussed and related to theoretical predictions.

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Authors and Affiliations

  1. Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, W-7000, Stuttgart 80, Federal Republic of Germany

    T. Rabenau, A. Simon & R. K. Kremer

  2. Kernforschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, W-7500, Karlsruhe, Federal Republic of Germany

    E. Sohmen

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  1. T. Rabenau
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  2. A. Simon
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  3. R. K. Kremer
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  4. E. Sohmen
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Rabenau, T., Simon, A., Kremer, R.K. et al. The energy gaps of fullerene C60 and C70 determined from the temperature dependent microwave conductivity. Z. Physik B - Condensed Matter 90, 69–72 (1993). https://doi.org/10.1007/BF01321034

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  • DOI: https://doi.org/10.1007/BF01321034

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