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Femtosecond dynamics of Final-state effects in the valence band photoemission of silver clusters on a graphite substrate

  • H. Hövel
  • B. Grimm
  • M. Pollmann
  • B. Reihl
Conference paper

Abstract

We studied the electronic structure of quasi size-selected silver clusters grown in nanopits of a graphite surface using ultraviolet photoelectron spectroscopy at T = 40 K. For clusters with more than 9 × 102 atoms the initial state of the d-electrons has already reached the bulk limit, but there is a dynamic final-state effect which we can explain with a simple model taking into account the finite lifetime of the photohole (corresponding to a charged cluster) and the cluster-substrate interaction on a femtosecond timescale. Below a critical cluster size of about 5 × 102 atoms we have observed additional initial-state effects.

PACS

36.40.Mr Spectroscopy and geometrical structure of clusters 79.60.-i Photoemission and photo?electron spectra 61.16.Ch Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc. 73.23.Ps Other electronic properties of mesoscopic systems 

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Copyright information

© Springer-Verlag Italia 1999

Authors and Affiliations

  • H. Hövel
    • 1
  • B. Grimm
    • 1
  • M. Pollmann
    • 1
  • B. Reihl
    • 1
  1. 1.University of Dortmund, Experimentelle Physik IDortmundGermany

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