Charge States of Bare Silicon Clusters up to Si8 by Non-Conventional Tight-Binding Method

A recently developed non-conventional tight-binding method was applied in combination with molecular dynamics to compute the geometric structures and cohesion energies of small stable pure Si clusters containing from 3 to 8 atoms, in neutral, positive and negative charge states. The influence of the charge state on the cluster configuration and cohesion energy is considered. The Anderson U(-) effect is observed in Si3-Si5 clusters. Doubly positively charged states are found to be the most energetically stable form for all clusters considered. The results computed with this semi-empirical approach are compared to predictions from state-of-the-art ab initio methods

Charge States of Bare Silicon Clusters up to Si8 by Non-Conventional Tight-Binding Method

A recently developed non-conventional tight-binding method was applied in combination with molecular dynamics to compute the geometric structures and cohesion energies of small stable pure Si clusters containing from 3 to 8 atoms, in neutral, positive and negative charge states. The influence of the charge state on the cluster configuration and cohesion energy is considered. The Anderson U(-) effect is observed in Si3-Si5 clusters. Doubly positively charged states are found to be the most energetically stable form for all clusters considered. The results computed with this semi-empirical approach are compared to predictions from state-of-the-art ab initio methods

Structure and Charge States of the Selected Hydrogenated Silicon Clusters Si2-Si8 by Non-Conventional Tight-Binding Method

Structures of SinHm clusters in neutral, positive and double positive charge states have been calculated by nonconventional tight-binding method and molecular dynamics. An influence of the charge state and the termination by hydrogen of dangling bonds on cluster structures those are obtained as a result of chemical vapor precipitation in silane, is considered for the first time. Fully hydrogenated clusters have tetrahedral branched structures. Other isomers have forms of closed circles

Charge state effects in state and motion of hydrogen in hydrogenated silicon systems

Consiglio Nazionale delle Ricerche - Biblioteca Centrale - P.le Aldo Moro,7, Rome / CNR - Consiglio Nazionale delle RichercheSIGLEITItal