Electric dipole polarizabilities of copper clusters |
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Authors: | Knickelbein Mark B |
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Affiliation: | Chemistry Division, Argonne National Laboratory Argonne, Illinois 60439, USA. knickelbein@anl.gov |
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Abstract: | The static electric dipole polarizabilities of Cu(9)-Cu(61) have been measured via a molecular beam deflection method. The clusters display per-atom polarizabilities that decrease monotonically with size, from approximately 16 A(3) per atom Cu(9-10) to approximately 5 A(3) (Cu(45-61)). Absent are any discernible discontinuities or odd-even alternations due to electronic shell filling or electron pairing effects. For the smallest clusters, the experimental polarizabilities are approximately 3 times larger than those predicted classically for conducting ellipsoids, and approach the classical values only for clusters containing more than approximately 45 atoms. |
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