The energy-level structure of a Jahn-Teller system strongly coupled to many modes of vibration
- 10 January 1983
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 16 (1) , 85-106
- https://doi.org/10.1088/0022-3719/16/1/012
Abstract
A transformation of a Jahn-Teller Hamiltonian with multimode interactions is developed, and used to discuss Raman scattering from an impurity in a crystal. It is shown that the same transformation can account both for the sharp, low-energy features that look like scattering associated with a local mode and the broad band which is typical of impurity-assisted scattering from a spectrum of phonons. The coexistence of these two features is shown to be characteristic of strong Jahn-Teller coupling. Line widths and energies are calculated for the sharp features. The effects of stress and the proper definition and use of Ham factors in the presence of a multimode interaction are discussed.Keywords
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