Molecular Dynamics Study of Surface Segregation in Liquid Semiconductor
Wenbin Yu, Eidea Labs, Inc., 1911 N. Fort Myer Dr., no. 408,
Arlington, VA 22209, and D. Stroud, Department of Physics,
The Ohio State University, Columbus, Ohio 43210-1106
We report the results of a molecular-dynamics study of the surface tension and
surface profile of liquid Si and Ge and their alloys,
using empirical Stillinger-Weber potentials. The calculations are
carried out at two temperatures slightly above the melting
temperatures of Si and Ge, for the pure elements and for the
alloys Si_0.8 Ge_0.2 and Si_0.2Ge_0.8.
They show clear evidence of surface segregation by Ge, the component with the
lower surface tension.
PACS Nos.: 61.20.Ja, 61.20.Gy, 61.25.Mv, 68.10.Cr