Ornstein-Zernike direct correlation function from diffraction experiments in supercooled liquid silicon and in disordered cobalt
Faculty of Sciences. Physics
Physics and chemistry of liquids. - London
, p. 131-136
University of Antwerp
Using experimental data for the structure factor S(q) of supercooled liquid silicon, and amorphous and supercooled liquid cobalt, we have calculated and compared the Fourier transform c(q) of the Ornstein-Zernike direct correlation function for these two systems. Differences of c(q) between Si and Co are ascribed to the different atomic coordination and packing, high in Co due to typical metallic bonding, and lower in Si due to more directional bonding. Also, in contrast to previous expectations, differences are found between the direct correlation function of amorphous and supercooled liquid cobalt.