Propagation of non-equilibrium acoustic phonons in a coarse-grained ZnSe produced through chemical synthesis from a vapor phase was studied for phonons generated optically or by a metallic heater. The material was characterized by a micro-twin structure in randomly oriented grains. Phonon transport studies, in combination with low-temperature photoluminescence, optical and electron microscopy, and X-ray diffraction analysis, made it possible to establish the decisive role played by extended defects in scattering of high-frequency acoustic phonons in this material.

Scattering of Nonequilibrium Acoustic Phonons in Coarse-Grained Pure ZnSe with Random Microtwin Structure. V.S.Bagaev, T.I.Galkina, A.I.Sharkov, A.Y.Klokov, V.P.Martovitskiĭ, V.S.Krivobok, Y.V.Klevko, S.G.Chernook: Physics of the Solid State, 2007, 49[7], 1241-6