VIBRATIONAL PROPERTIES OF THE QUASI-ONE-DIMENSIONAL NANOSTRUCTURED LATTICE OF AMORPHOUS SILICON

Дмитрий КРЫШМАРЬ Молдавский государственный университет

Abstract

In this paper, a theoretical study has been conducted to determine the quantum states of the vibration motion of atoms in amorphous silicon nanowires. Dispersion dependencies were calculated at various degrees of amorphization of such nanometer structures with dimensions of only a few monolayers. It is shown that the curves of phonon densities are in agreement with experimental results and change significantly in amorphous nanowires as compared with crystalline nanowires. The effect of a strong drop in average group velocities of the phonon transport is observed in silicon amorphous nanowires, explained by size quantization of the phonon spectrum due to a disordering of atomic bonds that form quasi-one-dimensional nanostructures. Keywords: quasi-one-dimensional amorphous nanostructures, Valence Force Field model, phonon transport.