Dependence of GaAs and Si surface energy on the misorientation angle of crystal planes

The paper reports on the dependence of Si and GaAs surface energies on the misorientation angle of Si and GaAs crystal planes in a broad angle range. The energetic balance between GaAs and Si is unfavourable for growth of GaAs on Si substrate. Minima of the surface energy correspond to GaAs/Si heterostructure interface energy minima which indicate preferable crystal orientations for obtaining GaAs layers on Si.