Geodesic
Polariton states in ferroelectrics of the order-disorder type
Teoretičeskaâ i matematičeskaâ fizika, Tome 39 (1979) no. 1, pp. 106-117 
Yu. V. Kozitskii; R. R. Levitskii; I. V. Stasyuk. Polariton states in ferroelectrics of the order-disorder type. Teoretičeskaâ i matematičeskaâ fizika, Tome 39 (1979) no. 1, pp. 106-117. http://geodesic.mathdoc.fr/item/TMF_1979_39_1_a10/
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Voir la notice de l'article provenant de la source Math-Net.Ru

For the example of a simple model, a study is made of the dynamics of an order-disorder ferroelectric with allowance for retardation effects. It is shown that the spectrum of such ferroelectrics contains excitations that are a “mixture” of the ferroelectric branch and photons (the so-called polariton states). The excitation spectrum and its damping is analyzed, and the consequences of allowing for retardation effects and their possible experimental verification are discussed.

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