Potential energy surface study of X@Si${}_{32}$X${}_{44}^{-}$(X=Cl, Br) clusters to decipher the stabilization process of Si${}_{20}$ fullerene

Deb Sankar De, Santanu Saha, Stefan Goedecker

Efforts toward stabilization of the Si${}_{20}$ fullerene through different schemes have failed despite several theoretical predictions. However, recently Tillmann {\it et. al.} succ…