A Many-Body Embedded Atom Potential for Describing Ejection of Atoms from Surfaces’

Barbara Jane Garrison, K. Walzl, M. El-Maazawi, Nicholas Winograd, C. T. Reimann, D. M. Deaven

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this paper, we show that many-body interactions are important for describing the energy- and angle-resolved distributions of neutral Rh atoms ejected from keV-ion-bombarded Rh(lll}, We compare separate classical-dynamics simulations of the sputtering process assuming either a many-body potential or a pairwise additive potential. The most dramatic difference between the many-body potential and the pair potential is the predicted kinetic energy distributions. The pair-potential kinetic energy distribution peaks at ~ 2 eV, whereas the many-body potential predicts a broader peak at ~ 4 eV, giving much better agreement with experiment. This difference between the model potentials is due to the predicted nature of the attractive interaction in the surface region through which all ejecting particles pass.

Original languageEnglish (US)
Pages (from-to)287-292
Number of pages6
JournalRadiation Effects and Defects in Solids
Volume109
Issue number1-4
DOIs
StatePublished - Jan 1 1989

All Science Journal Classification (ASJC) codes

  • Radiation
  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Condensed Matter Physics

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