Rotational dynamics of C 60 in superconducting K 3 Ba 3 C 60

Serena Margadonna, Wen Zhi Li, Kosmas Prassides, D. A. Neumann

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The orientational dynamics of C60 in superconducting K3Ba3C60 are studied by neutron inelastic scattering. Low-energy excitations are present near ~6 meV between 150 and 320 K and are assigned to small-amplitude librations of the C609- ions. They are harder and broader than those measured in K3C60, reflecting the existence of a stronger and more anisotropic orientational potential. The anisotropy and dispersion effects are also larger than those in isostructural Rb6C60, as a result of positional disorder of the Ba2+ and K+ ions, which reside in distorted tetrahedral interstices. The estimated barrier of the hindrance potential, Ea, is ~1.4 eV.

Original languageEnglish
Pages (from-to)472-476
Number of pages5
JournalChemical Physics Letters
Issue number6
Publication statusPublished - 2000 Jun 2

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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