Symmetry states of vibronic Frenkel excitons

Mladen Georgiev, Jai Singh

Research output: Contribution to journalComment/debate


Small-radius Frenkel excitons coupled with phonons can have diverse configurational structures depending on the symmetry of the electronic states involved and that of the associated inter-ionic vibrations. A theory is presented for the excitonic polarons arising from the coupling with the symmetry retaining vibrational modes and vibronic excitons arising from the coupling with symmetry-breaking modes. Simple models for each type are presented and their results are related with those of specific experimental situations. Implications for the defect-formation processes under ionizing conditions are discussed.
Original languageEnglish
Pages (from-to)47-59
Number of pages13
JournalChemical Physics
Issue number1
Publication statusPublished - 1993


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