Journal
PHYSICAL REVIEW B
Volume 81, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.195404
Keywords
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Funding
- Air Force Office of Scientific Research [FA 9550-09-1-0371, FA 9550-07-1-0151]
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The limits and useful modifications of the jellium model are of great interest in understanding the properties of metallic clusters, especially involving bimetallic systems. We have measured the relative reactivity of CuAl(n)(-) clusters (n= 11-34) with O(2). An odd-even alternation is observed that is in accordance with spin-dependant etching, and CuAl(22)(-) is observed as a magic peak. The etching resistance of CuAl(22)(-) is explained by an unusually large splitting of the 2D(10) subshell that occurs because of a geometric distortion of the cluster that may also be understood as a crystal field splitting of the superatomic orbitals.
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