Abstract
Energetically low-lying equilibrium geometric structures and electronic structures of Al n V (n = 2–24) clusters were investigated using density-functional theory within generalized gradient approximation. From the most stable geometric structures, a structural transition with the doped vanadium atom residing from the surface to the interior of the cluster was found from n = 16 to 19. This geometric transition fits well with the early experimental result based on the argon physisorption [S.M. Lang, P. Claes, S. Neukermans, E. Janssens, J. Am. Soc. Mass Spectrom. 22, 1508 (2011)]. Due to the geometric transition, average Al-V bond lengths and coordination numbers of V atoms for the most stable structures of Al n V clusters undergo an increases from n = 16 to 19. The relative stabilities, electronic structures, and other relevant properties were also discussed. It was found that doping of a V atom in the Al n cluster strengthen the stability of the framework and the Al4,6,8,10,13,16,19,21V clusters were more stable than their neighbors. Moreover, the Mulliken populations showed that the intra-atomic hybridization exists in both V and Al atoms and charge transfer from Al atoms to V atom were also found in these complexes, which could reflect the Al-V hybridizations. Electronic structure analysis based on the partial density of states reveals stronger Al-V hybridization for the endohedrally doped structures.
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Hua, Y., Liu, Y., Jiang, G. et al. Minimal size of endohedral singly vanadium-doped aluminum cluster: a density-functional study. Eur. Phys. J. D 67, 267 (2013). https://doi.org/10.1140/epjd/e2013-40306-0
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DOI: https://doi.org/10.1140/epjd/e2013-40306-0