Title of article :
Morphological evolution of heteroepitaxial islands during Stranski–Krastonov growth
Author/Authors :
P. Liu، نويسنده , , Y.W. Zhang، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Abstract :
Three-dimensional finite element method is used to simulate the formation, self-assembly and shape transition of heteroepitaxial
islands during Stranski–Krastonov growth. In the formulation, strain energy, surface energy, surface anisotropy
and elastic anisotropy of a cubic lattice structure are taken into account. In the simulations, the SiGe/Si material
system is used as a model system. An empirical surface energy as a function of surface orientation is proposed. The minimum
energy surfaces are identified based on existing experimental observations. The simulation results show that the coupling
of elastic energy relaxation, surface energy anisotropy and elastic anisotropy strongly influences the surface
roughening morphology, self-assembly and shape transition of epitaxial islands, resulting in diverse evolution pathways.
Keywords :
Surface diffusion , Self-assembly , Finite elements , Epitaxial islands
Journal title :
International Journal of Solids and Structures
Journal title :
International Journal of Solids and Structures