Phonons and Phonon‐Mixing in ZnSe Isotopic Crystals, Pressure‐cycled Domains, and Nanorods

Pressure‐Raman spectra are compared for bulk crystalline 68Zn76Se and ZnSe nanorods. The broadening of TO(Γ) and LO(Γ) is explained by multiphonon mixing and the position of a gap in the 2‐phonon DOS. Nucleation of the phase transition in 68Zn76Se leads to striking similarities in the Raman spectra of retrieved bulk and nanorod samples.