Enhancement of cluster yield under gold dimer oblique bombardment of the silicon surface

M. Medvedeva, I. Wojciechowski, B. J. Garrison

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)148-151
Number of pages4
JournalApplied Surface Science
Volume203-204
DOIs
StatePublished - Jan 15 2003

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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