Electromigration-driven Evolution of the Surface Morphology and   Composition for a Bi-Component Solid Film
  A two PDEs-based model is developed for studies of a morphological and compositional evolution of a thermodynamically stable alloy surface in a strong electric field, assuming different and anisotropic diffusional mobilities of the two atomic components. The linear stability analysis of a planar surface and the computations of morphology coarsening are performed. It is shown that the conditions for instability and the characteristic wavelength and growth rate differ from their counterparts in a single-component film. Computational parametric analyses reveal the sensitivity of the scaling exponents to the electric field strength and to the magnitude of the anisotropies difference. 
Mikhail Khenner and Mahdi Bandegi
cond-mat.mtrl-sci cond-mat.mes-hall nlin.PS