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Quantum confinement effects on the first LO phonon mode in CdTe due to the roughness surface are studied using Raman spectroscopy. Our findings suggest that the sharper experimental Raman pick obtained with an excitation wavelength near the E0 transition of CdTe due the roughness surface can be explained by a confinement effect and that the right line wing of the experimental line shape for a smooth zone cannot be ascribed to the first LO and TO phonon CdTe

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