Ordering phenomena in C60-tetraphenylphosphonium bromide
Laboratoire de Physique des SolidesUMR 8502 du CNRS, bâtiment 510,
Université Paris-Sud, 91405 Orsay Cedex, France
2 Centre de Recherche Paul Pascal, Université de Bordeaux I, avenue Schweitzer, 33600 Pessac, France
Published online: 15 June 2000
The fulleride salt C60-tetraphenylphosphonium bromide is investigated as a function of temperature by single crystal X-ray diffuse scattering and diffraction. At room temperature, the C60 orientational disorder is found to be more complex than previously expected. Moreover, a structural phase transition, due to the C60 orientational ordering, is evidenced around 120 K. Its relation with the stabilization of a static Jahn-Teller effect is discussed.
PACS: 61.10.Eq – X-ray scattering (including small-angle scattering) / 61.10.Nz – Single-crystal and powder diffraction / 61.48.+c – Fullerenes and fullerene-related materials
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000