Effect of a Brownian Sublattice on Polariton Dispersion

Autor:	P. da R. Andrade, L. Merten
Rok vydání:	1974
Předmět:	Method of undetermined coefficients Classical mechanics Condensed matter physics Chemistry Polariton Perturbation (astronomy) Condensed Matter Physics Brownian motion Electronic Optical and Magnetic Materials
Zdroj:	physica status solidi (b). 62:641-653
ISSN:	1521-3951 0370-1972
DOI:	10.1002/pssb.2220620234
Popis:	A set of coupled equations describing the effect of a disorder mechanism on polariton dispersion is given. The treatment differs from that one finds in the literature because the disorder mechanism is not taken as a second-order perturbation. A particular solution of these coupled equations shows that all originally undamped polaritons become damped waves. They all shift in frequency. Physical properties of different wave types in an order-disorder crystal are discussed. For the complex frequencies of the coupled waves a modified Kurosawa relation and a modified LST relation is valid. Numerical evaluations of this model shall be given in a forthcoming paper.
Databáze:	OpenAIRE
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