Abstract

Electron correlation on metallic surfaces is studied for the first time with the use of the slave-boson functional integral method. The ground-state properties of the semi-infinite simple-cubic model in the non-magnetic state are investigated. The double occupancy, delta n, and the band narrowing factor, qn, on layer n are calculated as a function of the electron interaction. It is shown that delta 1 and q1 on the surface show a peculiar behaviour depending on the ratio U1/Ub where U1(Ub) denotes the interaction on the surface (in the bulk).

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