Jahn–Teller Distortion Versus Spin–Orbit Splitting: Symmetry of Small Heavy-Metal Atom Clusters |
| |
Authors: | Alexander Baldes Rebekka Gulde Florian Weigend |
| |
Institution: | 1.Institut für Physikalische Chemie, Abteilung für Theoretische Chemie, Karlsruher Institut für Technologie,Karlsruhe,Germany;2.Institut für Nanotechnologie, Karlsruher Institut für Technologie,Eggenstein-Leopoldshafen,Germany |
| |
Abstract: | Metal clusters often show slight deviations from high molecular point group symmetry. The reason for this is a Jahn–Teller
distortion because of partial occupation of orbitals that are degenerate in the highly symmetric case. For heavy elements
spin–orbit coupling, which usually is not regarded in quantum chemical treatments of clusters, becomes non-negligible. This
leads to splitting of degenerate orbitals, so that the reason for distortion is no longer given. In a rigorous study of neutral,
cationic and anionic 4–6 atomic clusters of W, Re, Tl and Pb it is demonstrated that in some cases regarding spin–orbit coupling
indeed yields a highly symmetric global minimum structure, whereas neglecting this effect leads to distorted structures of
lower symmetry. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|