A new approach is proposed for describing the deformation of the C60 molecule in the polymer-like phase of the fullerides AC60 (A=K, Rb). A discrete basis of orientational states of the molecule is introduced, and orientational ordering is described on the basis of a phenomenological theory. A symmetry analysis of the molecular vibrations in the Fm3m phase is performed. It is shown that small rotations of the C60 can occur at a phase transition.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)