Surface evolution of elastically stressed films under deposition by a diffuse interface model

  • Authors:
  • Andreas Rätz;Angel Ribalta;Axel Voigt

  • Affiliations:
  • Crystal Growth Group, Research Center caesar, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany;Crystal Growth Group, Research Center caesar, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany;Crystal Growth Group, Research Center caesar, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2006

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Abstract

We consider the heteroepitaxial growth of thin films by numerical simulations within a diffuse interface model. The model is applicable to describe the self-organization of nanostructures. The influence of strain, surface energies and kinetics on the surface evolution is considered. A matched asymptotic analysis shows the formal convergence of an anisotropic viscous Cahn-Hilliard model to a general surface evolution equation. The system is solved by adaptive finite elements in three dimensions and in special cases compared with sharp interface models.