J. Phys. Colloques
Volume 41, Numéro C8, Août 1980Fourth International Conference on Liquid and Amorphous Metals
|Page(s)||C8-280 - C8-283|
J. Phys. Colloques 41 (1980) C8-280-C8-283
A DOUBLE HARD SPHERE MODEL FOR MOLTEN SEMICONDUCTORS AND SEMIMETALSB.R. Orton
Physics Department, Brunel University, Kingston Lane, Uxbridge, U.K.
The experimental interference functions for Si, Ge, Ga, Sn, Sb and Bi all exhibit a subsidiary maximum on the high K side of the first main peak. It is shown that this feature may be reproduced by a double hard sphere model which contains the following assumptions, (a) The liquid consists of two atomic species, A and B, corresponding to long and short distances of atomic separation. (b) The interaction of species A and B gives the same atomic separation as between A species. Thus the total interference function of this binary mixture is a superposition of only two partial interference functions have been used for these partials. This model is discussed in the light of possible bonding in the liquid and the recent ideas of core polarization effects in these liquid metals. It is shown how this model may be extended to the binary alloy Cu-Sn.