TY - JOUR
T1 - Enhancement of cluster yield under gold dimer oblique bombardment of the silicon surface
AU - Medvedeva, M.
AU - Wojciechowski, I.
AU - Garrison, B. J.
N1 - Funding Information:
The financial support of the National Science Foundation through the Chemistry Division and the MRI Program are gratefully acknowledged. Additional computational resources were provided in part by the IBM Selected University Resource Program and the Center of Academic Computing of Penn State University. The authors thank Kristin Krantzman and Arnaud Delcorte for helpful discussion and advice. M.M. thanks the PCPM Laboratory (Université Catholique de Louvain) for providing computer facilities.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2003/1/15
Y1 - 2003/1/15
N2 - Recent experiments of silicon bombardment show that kilo electron volt heavy polyatomic projectiles can increase the non-linear enhancement of the total yield of secondary silicon ions as well as the cluster ones. To understand why the heavy polyatomic projectiles increase the yields, molecular dynamics simulations of the bombardment of a Si(100)-(2 × 1) surface by Al n and Au n , n = 1, 2 with an initial energy of 1.5 keV/atom at the incident angle of 45° are carried out. The microscopic analysis shows that upon penetrating into the substrate the Au 2 constituents disintegrate slowly and the collision cascades overlap with a large probability. The process of sharing and depositing energy near the surface is very effective in the Au 2 case under these bombardment parameters. Thus the probability of high yield events for enhancement of cluster yield is increased.
AB - Recent experiments of silicon bombardment show that kilo electron volt heavy polyatomic projectiles can increase the non-linear enhancement of the total yield of secondary silicon ions as well as the cluster ones. To understand why the heavy polyatomic projectiles increase the yields, molecular dynamics simulations of the bombardment of a Si(100)-(2 × 1) surface by Al n and Au n , n = 1, 2 with an initial energy of 1.5 keV/atom at the incident angle of 45° are carried out. The microscopic analysis shows that upon penetrating into the substrate the Au 2 constituents disintegrate slowly and the collision cascades overlap with a large probability. The process of sharing and depositing energy near the surface is very effective in the Au 2 case under these bombardment parameters. Thus the probability of high yield events for enhancement of cluster yield is increased.
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U2 - 10.1016/S0169-4332(02)00719-5
DO - 10.1016/S0169-4332(02)00719-5
M3 - Article
AN - SCOPUS:0037438078
VL - 203-204
SP - 148
EP - 151
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -