Titlebook: Collective Excitations in Solids; Baldassare Bartolo Book 1983 Plenum Press, New York 1983 crystal.crystal structure.diffusion.dispersion.

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H. Forst,J. Racenberg,K. Peter,K. Messmerr large polarons are reviewed. The properties of polarons, as for example self-energy and effective mass are described. Finally small polarons and the difference between these latter and Fröhlich’s polarons are discussed.

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Current Concepts in Critical Caren of the elastic wave equation and of the Maxwell equations combined with the appropriate boundary conditions yields the dispersion relations of Rayleigh waves and of polaritons associated with surface plasmons, excitons, optical phonons and magnons, respectively. The second part is devoted to the t

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