Berry-Phase and Symmetry of the Ground State in Dynamical Jahn-Teller Systems

Details Berry-Phase and Symmetry of the Ground State in Dynamical Jahn-Teller Systems Berry-Phase and Symmetry of the Ground State in Dynamical Jahn-Teller Systems

1997-09-08

arxiv.org/abs/cond-mat/9709094v1

Fullerenes. Recent Advances in the Chemistry and Physics of Fullerenes and Related Materials - volume 5, ed. by K.M. Kadish an

Physics

Condensed Matter

8 pages, 1 ps fig

Scientific paper

We show through selected examples, relevant to the physics of fullerene ions,
that the presence of a Berry phase in dynamical Jahn-Teller systems does not
guarantee the degeneracy of the ground state, contrary to what previously
believed. Moreover, we introduce a new class of Jahn-Teller systems with no
Berry phase, as a generalization of the basic icosahedral $H \otimes h$ case.

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