Zeitschrift für Physik

, Volume 267, Issue 3, pp 201–208

On the theory of chemisorption

  • W. Brenig
  • K. Schönhammer

DOI: 10.1007/BF01669221

Cite this article as:
Brenig, W. & Schönhammer, K. Z. Physik (1974) 267: 201. doi:10.1007/BF01669221


A solution of the Anderson model for chemisorption including correlation effects is presented. The solution becomes exact in three limiting cases (largeU, smallU i.e. Hartree-Fock and the so-called symmetric strong coupling limit) of the intra atomic Coulomb repulsionU and the hopping termV. Excellent agreement of our approximation with Schrieffer's exact numerical results for the binding energy of a small model system is found. Our results for the binding energy and the charge of the adsorbate show a significant improvement over the Hartree-Fock approximation. The single particle spectral density of the H-F approximation turns out to be even qualitatively wrong in the largeU strong coupling limit.

Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • W. Brenig
    • 1
    • 2
  • K. Schönhammer
    • 1
  1. 1.Physikdepartment der TUMMünchen-Garching
  2. 2.Max-Planck-Institut für FestkörperforschungStuttgart