Nonlinear evolution of surface morphology in InAs/AlAs superlattices via surface diffusion

Details Nonlinear evolution of surface morphology in InAs/AlAs superlattices via surface diffusion Nonlinear evolution of surface morphology in InAs/AlAs superlattices via surface diffusion

2006-12-12

arxiv.org/abs/cond-mat/0612290v1

Phys. Rev. Lett. 96 (2006) 136102

Physics

Condensed Matter

Materials Science

4 pages, 3 figures, published in Phys. Rev. Lett. http://link.aps.org/abstract/PRL/v96/e136102

Scientific paper

10.1103/PhysRevLett.96.136102

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 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.

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