Title: Two-dimensional magic numbers in mass abundances of photofragmented bimetallic clusters
Authors: Janssens, Ewald ×
Tanaka, Hiromasa
Neukermans, Sven
Silverans, Roger
Lievens, Peter #
Issue Date: May-2003
Publisher: Iop publishing ltd
Series Title: New Journal of Physics vol:5 pages:1-10
Article number: 46
Abstract: The stability of cationic gold clusters doped with one transition metal atom was investigated by a mass spectrometric analysis of fragments resulting from high fluence irradiation of a cluster beam. Strongly enhanced abundances are found for Au5X+, X = V, Mn, Cr, Fe, Co, Zn, which implies that these species are far more stable towards fragmentation than their neighbouring cluster sizes. Here we interpret the enhanced stability of these clusters within a shell model approach for two-dimensional (2D) systems: the number of delocalized electrons in Au5X+ is six, which is a magic number for 2D systems. Quantum chemical calculations for AuNZn+ (N = 2-6) predict planar structures that are stabilized by the influence of the dopant atom. Also, the main features of the calculated molecular orbitals are well reproduced by a simple electron-in-a-box model. The present report constitutes the first observation of 2D magic numbers in size dependent properties of metal clusters.
ISSN: 1367-2630
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physics and Astronomy - miscellaneous
Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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