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Evidence for size-dependent electron delocalization in the ionization potentials of lithium monocarbide clusters

Authors
Journal
Chemical Physics Letters
0009-2614
Publisher
Elsevier
Publication Date
Volume
302
Identifiers
DOI: 10.1016/s0009-2614(99)00163-3

Abstract

Abstract Lithium clusters doped with carbon atoms are studied by threshold photoionization spectroscopy and ionization potentials are deduced for Li n C ( n⩽70). The evolution of the ionization potentials with size shows distinct steps at n=24 and n=44, suggesting metallic behavior with n−4 free electrons in the larger clusters. Deviations from the metal-like behavior for the size range n<16 suggest a structural transition from rigid structures with localized electron orbitals towards segregated molecular-metallic systems for increasing size.

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