Neutron Spectroscopy of Superconducting Fullerides

MRS Online Proceedings Library volume 270, pages185–190(1992)Cite this article

Abstract

The phonon spectra of pristine fullerene, superconducting K3C60 and saturation-doped Rb6C60 measured by inelastic neutron scatteringin the energy range 2.5–200 meV at low temperatures reveal substantial broadening of five-fold degenerate Hg intramolecular vibrational modes both in the low-energy radial and the high-energy tangential part of the spectrum. This provides strong evidence for a traditional phonon-mediated mechanism of superconductivity in the fullerides but with an electron-phonon coupling strength distributed over a wide range of energies (33–195 meV) as a result of the finite curvature of the fullerene spherical cage.

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Acknowledgement

We thank J.R.D. Copley, T.J.S. Dennis, J.P. Hare, H.W. Kroto, M. Schluter, R Taylor, D.R.M. Walton, and F. Zerbetto for valuable discussions. KP acknowledges support from the SERC and the Royal Society.

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Affiliations

  1. School of Chemistry and Molecular Sciences, University of Sussex, Brighton, BN1 9QJ, UK

    Kosmas Prassides & Christos Christides

  2. Rutherford Appleton Laboratory, Didcot, Oxon, OX11 0QX, UK

    John Tomkinson

  3. AT&T Bell Laboratories, Murray Hill, NJ, 07974

    Matthew J. Rosseinsky, D. W. Murphy & Robert C. Haddon

Authors
  1. Kosmas Prassides
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  2. Christos Christides
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  3. John Tomkinson
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  4. Matthew J. Rosseinsky
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  5. D. W. Murphy
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  6. Robert C. Haddon
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Correspondence to Kosmas Prassides or Christos Christides or John Tomkinson or Matthew J. Rosseinsky or D. W. Murphy or Robert C. Haddon.

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Prassides, K., Christides, C., Tomkinson, J. et al. Neutron Spectroscopy of Superconducting Fullerides. MRS Online Proceedings Library 270, 185–190 (1992). https://doi.org/10.1557/PROC-270-185

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