Platelike structures of semiconductor clusters Gen (n=40–44).

The structures of Gen (n=40–44) clusters were searched by genetic algorithm combined with a tight-binding method. First-principles calculations based on density functional theory were performed to further optimize the isomer structures. The calculated results show that Gen (n=40–44) clusters favor platelike structures, consisted of four small magic clusters (Ge9 or Ge10), and a Ge4 core. The Ge4 core along with the parts of the four linked small clusters forms a diamond segment. The cluster mobilities of the most stable structures are in good agreement with the experimental data. [ABSTRACT FROM AUTHOR]