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Phys. Rev. Lett. 89, 213403 (2002) [4 pages]

Onset of Metallic Behavior in Magnesium Clusters

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Owen C. Thomas, Weijun Zheng, Shoujun Xu, and Kit H. Bowen, Jr.
Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218

Received 15 April 2002; published 1 November 2002

We have measured the photoelectron spectra of mass-selected magnesium cluster anions, Mgn-, over the size range, n=3–35. Their s-p band gaps were observed to close at n=18, signaling the onset of metallic behavior. Electronic shell structure was implicated by gap “reopenings” and mass spectral magic numbers. Complementary calculations are presented in the companion paper [P. H. Acioli and J. Jellinek, Phys. Rev. Lett. 89, 213402 (2002)].


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.89.213403
DOI: 10.1103/PhysRevLett.89.213403
PACS: 36.40.Cg, 33.60.–q, 36.40.Wa, 61.46.+w

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