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Publication Citation: Kinetics Governing Phase Separation of Nanostructured Sn(x)Ge(1a 'x) Alloys.

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Author(s): Regina Regan; Harry A. Atwater; Jonathan E. Guyer; Erik Meserole; Mark S. Gorrsky;
Title: Kinetics Governing Phase Separation of Nanostructured Sn(x)Ge(1a 'x) Alloys.
Published: June 05, 2006
Abstract: We have studied the dynamic phenomenon of SnxGe1a 'x/Ge phase separation during deposition by molecular beam epitaxy on Ge(001) substrates.Phase-separation leads to the formation of direct bandgap semiconductor nanowire arrays embedded in Ge oriented along the [001] growth direction. The effect of strain and composition on the periodicity were decoupled by growth on Ge(001) and partially relaxed SiYGe-1-y/Ge(001) virtual substrates. The experimental results are compared with a kinetic linear instability model and the experimental results show good agreement with this theoretical model for phase separation during dynamic growth.
Citation: Physical Review B (Condensed Matter and Materials Physics)
Keywords: Asaro-Tiller,decomposition,solute expansion,Stranski-Krastanov
Research Areas: Materials Science
PDF version: PDF Document Click here to retrieve PDF version of paper (625KB)