Image-Screening of Positive Ions at Metal Surfaces, and Electronically Stimulated Desorption of Noble Gas Atoms

  • R. E. Walkup
  • Ph. Avouris
  • N. D. Lang
Conference paper
Part of the Springer Series in Surface Sciences book series (SSSUR, volume 19)


Diabatic potential energy curves are reported for ions interacting with metal surfaces. The calculations are based on a local density functional approach, which fully accounts for screening by the electrons within the metal valence band. Results for Ar+ are used to predict yields and energy distributions for Ar atoms which desorb upon ionization of physisorbed Ar. The calculated potentials provide a substantially improved description of the desorption process compared to previous models based on a classical image potential for the ion-surface interaction. Classical and quantal treatments of desorption are compared, and quantum effects in the dynamics of desorption are discussed.


Potential Energy Curve Kinetic Energy Distribution Classical Force Neutralization Rate Auger Decay 
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Copyright information

© Springer-Verlag Berlin, Heidelberg 1990

Authors and Affiliations

  • R. E. Walkup
    • 1
  • Ph. Avouris
    • 1
  • N. D. Lang
    • 1
  1. 1.IBM Research DivisionThomas J. Watson Research CenterYorktown HeightsUSA

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