DescriptionLabeled LO and TO phonon energies at gamma for GaAs.png
English: In the Lyddane–Sachs–Teller (LST) relation one considers the static and high-frequency dielectric constants, as well as the energies of the LO and TO phonons at gamma in the phonon disperion relation of a material. This image illustrates clearly these phonon energies for the example of GaAs, which allows one to better comprehend the LST relation.
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File:Labeled LO and TO phonon energies at gamma for GaAs.png
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In the Lyddane–Sachs–Teller (LST) relation one considers eps_st and eps_inf, as well as the energies of the LO and TO phonons at gamma in the phonon disperion. This image illustrates clearly these phonon energies for the example of GaAs.