EXPERIMENTAL PHOTOHOLE LIFETIMES DERIVED FROM TWO-DIMENSIONAL STATES IN Ag(111) FILMS DEPOSITED ONTO H-PASSIVATEDSi(111)-(1 × 1)SURFACES

A. Arranz, J. F. Sánchez-Royo, J. Avila, V. Pérez-Dieste and M. C. Asensio ()
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A. Arranz: LURE, Centre Universitaire Paris-Sud, Bât. 209 D, B.P. 34, 91898 Orsay Cedex, France;
J. F. Sánchez-Royo: LURE, Centre Universitaire Paris-Sud, Bât. 209 D, B.P. 34, 91898 Orsay Cedex, France;
J. Avila: LURE, Centre Universitaire Paris-Sud, Bât. 209 D, B.P. 34, 91898 Orsay Cedex, France;
V. Pérez-Dieste: LURE, Centre Universitaire Paris-Sud, Bât. 209 D, B.P. 34, 91898 Orsay Cedex, France
M. C. Asensio: LURE, Centre Universitaire Paris-Sud, Bât. 209 D, B.P. 34, 91898 Orsay Cedex, France;

Surface Review and Letters (SRL), 2002, vol. 09, issue 02, 729-734

Abstract: The linewidth of two-dimensional states appearing in the valence band spectra of 6–12-monolayer Ag(111) films deposited onto H-passivatedSi(111)-(1 × 1)substrates has been analyzed in order to obtain a lower limit of the photohole lifetime. An inverse quadratic energy dependence is expected according to the Fermi liquid theory. However, in contrast with the observed in the literature for Ag single crystals, an inverse linear energy dependence has been found for the photohole lifetime. This discrepancy could be attributed to the quantization in theΓ-Ldirection of the Ag-spstates available for the hole decay, which does not fulfill the energy-independent density of states hypothesis of the Fermi liquid theory.

Date: 2002
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DOI: 10.1142/S0218625X02002804

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