Applied Physics A

, Volume 88, Issue 3, pp 443–447 | Cite as

Local measurement of hot-electron phase-coherence at metal surfaces

  • M.A. Schneider
  • P. Wahl
  • L. Vitali
  • L. Diekhöner
  • R. Vogelgesang
  • K. Kern
Article

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.

Keywords

Scanning Tunneling Microscopy Coherence Length Noise Band Scanning Tunneling Spectroscopy Standing Wave Pattern 

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • M.A. Schneider
    • 1
    • 2
  • P. Wahl
    • 1
  • L. Vitali
    • 1
  • L. Diekhöner
    • 1
    • 3
  • R. Vogelgesang
    • 1
  • K. Kern
    • 1
    • 4
  1. 1.Max-Planck-Institut für FestkörperforschungStuttgartGermany
  2. 2.Lehrstuhl für FestkörperphysikUniversität ErlangenErlangenGermany
  3. 3.Institut for Fysik og NanoteknologiAalborg UniversitetAalborgDenmark
  4. 4.Institut de Physique des NanostructuresEcole Polytechnique Fédérale de LausanneLausanneSwitzerland

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