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Molecular dynamics simulation of nonlinear effects in sputtering - Au(100) and Au(111) targets

Shapiro, M. H. and Tombrello, T. A. (1991) Molecular dynamics simulation of nonlinear effects in sputtering - Au(100) and Au(111) targets. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 62 (1). pp. 35-42. ISSN 0168-583X. https://resolver.caltech.edu/CaltechAUTHORS:20141021-114832055

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Abstract

Nonlinear effects in sputtering from Au(100) and Au(111) targets have been simulated with the multiple-interaction molecular dynamics code SPUT2. Both dimer and single-ion (monomer) impacts were studied for Kr, Xe, Au, and U ions normally incident on Au(100) and Au(111) with energies of 5 keV/atom. Statistically significant nonlinear dimer-to-monomer yield ratios were found in all cases. For each case studied the dimer-to-monomer nonlinear yield ratio from the Au(111) target was greater than from the Au(100) target. However, this ratio decreased as the mass of the incident projectile increased. Our simulations suggest that this was the result of significant nonlinear effects that occured when the heavier single-ions impacted the Au(100) and Au(111) surfaces. The nonlinear effects observed at these bombarding energies appear to be due primarily to collisional spikes involving moving atoms, and only secondarily to the lowering of the surface binding energy that results from damage to the surface.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0168-583X(91)95924-3DOIArticle
http://www.sciencedirect.com/science/article/pii/0168583X91959243PublisherArticle
Additional Information:© 1991 Elsevier B.V. Received 22 April 1991 and in revised form 21 June 1991.
Funders:
Funding AgencyGrant Number
NSFDMR-8615641
NSFDMR-9002532
Issue or Number:1
Record Number:CaltechAUTHORS:20141021-114832055
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141021-114832055
Official Citation:Shapiro, M. H., & Tombello, T. A. (1991). Molecular dynamics simulation of nonlinear effects in sputtering — Au(100) and Au(111) targets. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 62(1), 35-42. doi: http://dx.doi.org/10.1016/0168-583X(91)95924-3
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50616
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:22 Oct 2014 16:49
Last Modified:03 Oct 2019 07:25

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