Excess electron surface states on clusters

Michael Rosenblit, Joshua Jortner*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

In this paper we present a theoretical study of the ground and excited surface states of an excess electron on isolated dielectric and metal clusters. An electron-cluster model potential, which consists of a short-range repulsive interaction with a strength V0 ≫ 13.6(a0/R)2 eV (where R is the cluster radius) and a long-range polarization potential, was used to explore the cluster size dependence and the dielectric constant (ε) dependence of the energetics and charge distribution of the electron surface states. Scaling relations were used for the quantification of the cluster size dependence of the physical properties near the localization threshold and for the bridging between the energetics on a cluster microsurface and a flat macrosurface. The onset of the cluster size for localization in the ground 1s (n = 1, l = 0) electronic state is characterized by a "critical" cluster radius Rc(10) ≃ 2.02(1-Q)a0/Q, where Q = (ε - 1)/4(ε + 1). Information on electronic spectroscopy was inferred from the cluster size and ε dependence of the transition energies. The behavior of an excess electron on metal clusters and on composite clusters (metal core coated by a He or Ne microsurface) will provide information on the size dependence of the dielectric constant and on the metal-nonmetal transition in large finite systems.

Original languageEnglish
Pages (from-to)9365-9370
Number of pages6
JournalJournal of Physical Chemistry
Volume98
Issue number37
DOIs
StatePublished - 1994

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