Nonlinear Evolution of Surface Morphology inInAs/AlAsSuperlattices via Surface Diffusion

O. Caha, V. Holý, Kevin E. Bassler
2006 Physical Review Letters  
Continuum simulations of self-organized lateral compositional modulation growth in InAs/AlAs short-period superlattices on InP substrate are presented. Results of the simulations correspond quantitatively to the results of synchrotron x-ray diffraction experiments. The time evolution of the compositional modulation during epitaxial growth can be explained only including a nonlinear dependence of the elastic energy of the growing epitaxial layer on its thickness. From the fit of the experimental
more » ... data to the growth simulations we have determined the parameters of this nonlinear dependence. It was found that the modulation amplitude don't depend on the values of the surface diffusion constants of particular elements.
doi:10.1103/physrevlett.96.136102 pmid:16712005 fatcat:dr2warsvjfhtphun7wpjd6rwkm