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Berry Phase and Ground State Symmetry in H x h Dynamical Jahn-Teller Systems

Nicola Manini·Paolo De Los Rios
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Abstract

Due to the ubiquitous presence of a Berry phase, in most cases of dynamical Jahn-Teller systems the symmetry of the vibronic ground state is the same as that of the original degenerate electronic state. As a single exception, the linear H x h icosahedral model, relevant to the physics of C60 cations, is determined by an additional free parameter, which can be continuously tuned to eliminate the Berry phase from the low-energy closed paths: accordingly, the ground state changes to a totally-symmetric nondegenerate state.

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BibTeXRIS

Nicola Manini, Paolo De Los Rios. 1999-07-01. Berry Phase and Ground State Symmetry in H x h Dynamical Jahn-Teller Systems. https://doi.org/10.1103/physrevb.62.29

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