Abstract:We report a systematic study of small silver clusters, Ag n , Ag n + , and Ag n − , n = 1−7. We studied all possible isomers of clusters with n = 5−7. We tested 42 exchange−correlation functionals, and we assess these functionals for their accuracy in three respects: geometries (quantitative prediction of internuclear distances), structures (the nature of the lowest-energy structure, for example, whether it is planar or nonplanar), and energies. We find that the ingredients of exchange−correlation functionals … Show more
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