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 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. The detailed values of the parameters not being known, the issue of the actual ground-state symmetry of C-60(+) is open.

Berry phase and ground-state symmetry in H circle times h dynamical Jahn-Teller systems / N. Manini, P. De los Rios. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 62:1(2000), pp. 29-32.

Berry phase and ground-state symmetry in H circle times h dynamical Jahn-Teller systems

N. Manini
Primo
;
2000

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 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. The detailed values of the parameters not being known, the issue of the actual ground-state symmetry of C-60(+) is open.
Settore FIS/03 - Fisica della Materia
2000
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/205216
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