Jahn-Teller effect direct molecular dynamics

Despite the difficulties mentioned above, by now a critical mass of data has been compiled enabling us to formulate a concise picture of the nature of the IT effect in these fascinating materials. In the rest of this paper we would like to summarize such experimental data with respect to the following questions Are the fulleride ions found in various compounds distorted Is the distortion dominated by the molecular Jahn-Teller effect or by the potential field of the environment In which direction is the molecule distorted and what is the shape of the distortion Is the distortion static or dynamic The way we approach these questions is the study of symmetry change through vibrational and electronic transitions. The fundamental concepts of these methods will be summarized in the next section. 

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