Alloys
A Brief Description

We have used the Real Space Green'sfunction technique to study the vibrational properties of the Si_{0.5}Ge_{0.5} alloy. Our results reproduce correctly the threemode behavior, which can not be obtained by the mean field approximation such as CPA. Our calculation also correctly predicts the intensities of the peaks associated with the three modes which can not be easily obtained by the supercell approach.

We have formulated a scheme to study the dynamics of a random overlayer on a substate such as A_{x}B_{1x}/B(110) where species A or B forms an FCC metal. Detailed formulation for the calculation of the layer density of states from the surface to the deeper layers has been developed.
Recent Publications in Alloys
 C.S. Jayanthi, S.Y. Wu and J.A. Cocks, Real Space Green's Function Approach to Study the Effects of Disorder on the Frequency Spectrum of Si/Ge Alloys, Phys. Rev. B 50, Sept. 15 (1994).
 C.S. Jayanthi, S.Y. Wu and J.A. Cocks, Dynamics of Random Overlayers, Vol. 6336 Physica B (1996).