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Inelastic neutron scattering results on pure and doped fullerenes

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Abstract

Via inelastic neutron scattering (INS) generalized phonon densities of states are obtained for C60 and superconducting A3C60 (A=K, Rb). Changes in the intramolecular modes agree with and augment recent Raman (RA), infrared (IR), and INS measurements, i.e., in the vicinity of the high-frequency modes of C60 [H g (8),A g (2),H g (7)] we find a pronounced shift of about 10 meV toward smaller energy transfers upon intercalating with potassium. Separated from these vibrations by a gap are the intermolecular spectra which for the doped samples display well-defined optic modes at 11 and 14 meV due to the vibrations of Rb and K ions. Indications of a weak anomalous temperature dependence of low-energy phonons (ħω <3 meV) nearT c are observed for K3C60.

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Authors and Affiliations

  1. Institut für Nukleare Festkörperphysik, Kernforschungszentrum Karlsruhe, Postfach 3640, W-7500, Karlsruhe, Germany

    F. Gompf, B. Renker, H. Schober, P. Adelmann & R. Heid

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  1. F. Gompf
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  2. B. Renker
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  3. H. Schober
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  4. P. Adelmann
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  5. R. Heid
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Gompf, F., Renker, B., Schober, H. et al. Inelastic neutron scattering results on pure and doped fullerenes. J Supercond 7, 643–645 (1994). https://doi.org/10.1007/BF00728477

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  • DOI: https://doi.org/10.1007/BF00728477

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