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Static dipole polarizability of alkali-metal clusters: Electronic exchange and correlation effects

1990; American Physical Society; Volume: 42; Issue: 17 Linguagem: Inglês

10.1103/physrevb.42.10950

1095-3795

Ángel Rubio, L. C. Balbás, Llorenç Serra, Manuel Barranco,

Molecular Junctions and Nanostructures

Nonlocal approximations for the electronic exchange and correlation effects are used to compute, within density-functional theory, the polarizability and surface-plasma frequencies of small jelliumlike alkali-metal clusters. The results are compared with those obtained using the local-density approximation and with available experimental data, showing the relevance of these effects in obtaining an accurate description of the surface response of metallic clusters.