Nonradiative DKR processes: revisiting the theory. II. Electron-vibrational mode coupling

Details Nonradiative DKR processes: revisiting the theory. II. Electron-vibrational mode coupling Nonradiative DKR processes: revisiting the theory. II. Electron-vibrational mode coupling

2007-05-09

arxiv.org/abs/0705.1361v1

Physics

Condensed Matter

Materials Science

22 pages including 4 figures, all pdf format

Scientific paper

We summarize a few proposals for mixing F center states through the mediation of an appropriate symmetry-breaking vibrational mode. Electron-mode coupling energies odd-order in the mode coordinates are characteristic of the pseudo-Jahn-Teller mixing of nearly-degenerate opposite-parity electronic states mediated by an odd-parity vibrational mode. Coupling energies even order in the vibrational coordinates lead to a pseudo-Renner mixing of even parity nearly-degenerate states or to dynamic-Renner mixing of degenerate states of whatever symmetry. Both Renner mixing energies add up to widen the crossover splitting of the adiabatic energies thereby enhancing the nonradiative deexcitation rate.

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