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

B. J. Garrison; K. Walzl; M. El-Maazawi; N. Winograd; C. T. Reimann; D. M. Deaven

doi:10.1080/10420158908220545

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

B. J. Garrison, K. Walzl, M. El-Maazawi, N. Winograd, C. T. Reimann, D. M. Deaven

Research output: Contribution to journal › Article › peer-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 language	English (US)
Pages (from-to)	287-292
Number of pages	6
Journal	Radiation Effects and Defects in Solids
Volume	109
Issue number	1-4
DOIs	https://doi.org/10.1080/10420158908220545
State	Published - Jul 1989

All Science Journal Classification (ASJC) codes

Radiation
Nuclear and High Energy Physics
General Materials Science
Condensed Matter Physics

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title = "A Many-Body Embedded Atom Potential for Describing Ejection of Atoms from Surfaces{\textquoteright}",

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.",

author = "Garrison, {B. J.} and K. Walzl and M. El-Maazawi and N. Winograd and Reimann, {C. T.} and Deaven, {D. M.}",

year = "1989",

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T1 - A Many-Body Embedded Atom Potential for Describing Ejection of Atoms from Surfaces’

AU - Garrison, B. J.

AU - Walzl, K.

AU - El-Maazawi, M.

AU - Winograd, N.

AU - Reimann, C. T.

AU - Deaven, D. M.

PY - 1989/7

Y1 - 1989/7

N2 - 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.

AB - 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.

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

Abstract

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