A quantum-mechanical calculation of finite-temperature elastic constants was carried out on the basis of tight-binding molecular dynamics. The evolution of elastic constants in melt-grown amorphous material during ion implantation was investigated. It was found that a key parameter in the crystalline to amorphous transition was the C44 constant.

G.De Sandre, L.Colombo, C.Bottani: Physical Review B, 1996, 54[17], 11857-60