2005
DOI: 10.1063/1.1851984
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Photoelectron spectroscopy of chromium-doped silicon cluster anions

Abstract: The photoelectron spectra of chromium-doped silicon cluster anions, CrSi-(n), were measured over the size range, n=8-12. Their vertical detachment energies were measured to be 2.71, 2.88, 2.87, 2.95, and 3.18 eV, respectively. Our results support theoretical calculations by Khanna, Rao, and Jena [Phys. Rev. Lett. 89, 016803 (2002)] which found CrSi12 to be an enhanced stability (magic) cluster with its chromium atom encapsulated inside a silicon cage and with its magnetic moment completely quenched by the effe… Show more

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Cited by 105 publications
(68 citation statements)
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“…21 These clusters with transition metal encapsulated by silicon are actually stabilized by cooperative electronic and geometric factors; their electronic factor of 20 electrons was found by theoretical calculations to be bond critical points in the charge density, 22 and the MSi m clusters have been the topic of experimental and theoretical studies in recent years. 23,24 Later, we reported experimental results obtained for the electronic and geometrical structures of MSi m clusters, which were intensively studied by systematically changing the central metal atoms among the atoms of groups 3-5 ͑M = Sc, Y, Lu, Ti, Zr, Hf, V, Nb, and Ta͒. 25 This strategy retained the high symmetry cage geometry while allowing systematic electronic changes in the MSi 16 clusters.…”
Section: Introductionmentioning
confidence: 99%
“…21 These clusters with transition metal encapsulated by silicon are actually stabilized by cooperative electronic and geometric factors; their electronic factor of 20 electrons was found by theoretical calculations to be bond critical points in the charge density, 22 and the MSi m clusters have been the topic of experimental and theoretical studies in recent years. 23,24 Later, we reported experimental results obtained for the electronic and geometrical structures of MSi m clusters, which were intensively studied by systematically changing the central metal atoms among the atoms of groups 3-5 ͑M = Sc, Y, Lu, Ti, Zr, Hf, V, Nb, and Ta͒. 25 This strategy retained the high symmetry cage geometry while allowing systematic electronic changes in the MSi 16 clusters.…”
Section: Introductionmentioning
confidence: 99%
“…One of the objectives of the research on superatoms (1-3) is to explore if one can carry out, what nature does, in a more facile and controlled manner. Developing an understanding of the factors governing the chemical behavior of clusters (4)(5)(6)(7)(8)(9)(10) and demonstrating that this knowledge can be used to design stable building blocks for new materials is critical for translating this concept into practice. For metal clusters, a simple electronic shell model called jellium (11) is routinely used to describe the global features of the electronic structure.…”
mentioning
confidence: 99%
“…The theoretical findings were confirmed by the experimental negative ion photodetachment spectra on CrSi n − clusters. 16 Further studies 10,11 on MSi 12 cages containing other 3d transition metal atoms yielded similar reduction of the transition metal moments. Thus, while the interaction between the metal atom and the cage stabilized the cluster, the resulting magnetic moments were completely quenched.…”
Section: Introductionmentioning
confidence: 79%