Local measurement of hot-electron phase-coherence at metal surfaces |
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| Authors: | MA Schneider P Wahl L Vitali L Diekhöner R Vogelgesang K Kern |
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| Institution: | 1.Max-Planck-Institut für Festk?rperforschung,Stuttgart,Germany;2.Lehrstuhl für Festk?rperphysik,Universit?t Erlangen,Erlangen,Germany;3.Institut for Fysik og Nanoteknologi,Aalborg Universitet,Aalborg,Denmark;4.Institut de Physique des Nanostructures,Ecole Polytechnique Fédérale de Lausanne,Lausanne,Switzerland |
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| Abstract: | We use scanning tunneling microscopy and spectroscopy to study the energy dependence of hot-electron scattering processes
on metal surfaces via the determination of the energy-dependent phase-coherence length. From this an electron lifetime can
be determined, which in the case of electrons in the surface state of Ag(111) and in the case of the n=1 image-potential state
on Cu(100) shows good agreement with theoretical modeling and other experimental data. The method is based on the quantitative
analysis of electron interference patterns. A theoretical analysis shows that the phase-coherence length can be determined
in confining nanostructures of a characteristic length scale smaller than the phase-coherence length.
PACS 73.20.At; 73.50.Gr; 72.10.Fk; 68.37.Ef |
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