A Density Functional Study of Magnetism in Bare Gold Nano-clusters

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dc.creatorMagyar, R. J.
dc.creatorMujica, V.
dc.creatorMarquez, M.
dc.creatorGonzalez, C.
dc.date2006-10-10
dc.date.accessioned2026-07-07T07:27:26Z
dc.date.available2026-07-07T07:27:26Z
dc.descriptionMagnetism in bare uncapped gold nano-clusters is explored from a density functional theory perspective with scalar relativistic effects included via the pseudo-potential. The computed electronic structures of various nano-clusters reveal that permanent size-dependent spin-polarization appears without geometry relaxation for bare clusters even though bulk gold is diamagnetic. The polarized ground states for clusters are favorable due to the hybridization of the s and d orbitals, and bare octahedral clusters are expected to be magnetic for cluster sizes of approximately 38 atoms and larger. Much larger clusters will be diamagnetic when the surface-to-volume ratio is small and the core diamagnetism prevails. Moderate changes in the inter-atomic distances and cluster geometry are shown not to alter this conclusion. Contrary to LDA and EAM predictions, GGA and hybrid geometry optimizations reveal increased inter-atomic bond distances in bare gold clusters relative to the bulk lattice values. This expansion enhances the preexisting spin polarization.
dc.description18 pages, 6 figures, 1 table
dc.identifierhttps://arxiv.org/abs/cond-mat/0610267
dc.identifierhttp://arxiv.org/abs/cond-mat/0610267
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/117377
dc.subjectMaterials Science
dc.titleA Density Functional Study of Magnetism in Bare Gold Nano-clusters
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