ANOMALOUS LIGHT-ABSORPTION IN MOLECULAR-CRYSTALS

Authors
Citation
Vi. Tovstenko, ANOMALOUS LIGHT-ABSORPTION IN MOLECULAR-CRYSTALS, Journal of experimental and theoretical physics, 85(3), 1997, pp. 554-564
Citations number
39
Categorie Soggetti
Physics
ISSN journal
10637761
Volume
85
Issue
3
Year of publication
1997
Pages
554 - 564
Database
ISI
SICI code
1063-7761(1997)85:3<554:ALIM>2.0.ZU;2-R
Abstract
The method of successive approximations is used to obtain a solution f or an infinite chain of nonlinear coupled equations for the Fourier tr ansform of the retarded two-time Green's function in a system in which the electron vibrational interactions of the lattice photons and of t he intramolecular photons are included in the terms of the Hamiltonian that are diagonal in the electron operators. A unique subsequence, wh ich provides a finite contribution to the integral intensity of the ab sorption spectrum, is extracted from the infinite series and summed. T he resulting formulas are used to classify the excited states of a cry stal and interpret the cases of anomalous light absorption, when the a bsorption intensity becomes inversely proportional to the Franck-Condo n overlap integral. (C) 1997 American Institute of Physics. [S1063-776 1(97)01709-5].