A nonorthogonal tight-binding study of silicon-germanium mixed clusters GemSin(m+n <= 10)

The geometrical structures and binding energies of GemSin mixed clusters (s = m + n less than or equal to 10) have been optimized based upon the nonor thogonal tight-binding scheme. GemSin mixed clusters are found similar in s tructures with Si-n and Ge-n (but with lower symmetries) and the binding en ergies of the mixed clusters are between the corresponding values of the Si -n and Ge-n.