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Kinetic pathways le...
Kinetic pathways leading to layer-by-layer growth from hyperthermal atoms : A Multibillion time step molecular dynamics study
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- Adamovic, Dragan, 1973- (författare)
- Linköpings universitet,Tekniska högskolan,Teoretisk Fysik
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- Chirita, Valeriu, 1959- (författare)
- Linköpings universitet,Tekniska högskolan,Tunnfilmsfysik
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- Münger, Peter, 1960- (författare)
- Linköpings universitet,Tekniska högskolan,Teoretisk Fysik
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- Hultman, Lars, 1960- (författare)
- Linköpings universitet,Tekniska högskolan,Tunnfilmsfysik
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- Greene, J.E. (författare)
- Materials Science Department and the Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, USA
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(creator_code:org_t)
- American Physical Society, 2007
- 2007
- Engelska.
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - : American Physical Society. - 1098-0121 .- 1550-235X. ; 76, s. 115418-115425
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- We employ multibillion time step embedded-atom molecular dynamics simulations to investigate the homoepitaxial growth of Pt(111) from hyperthermal Pt atoms (EPt=0.2–50eV) using deposition fluxes approaching experimental conditions. Calculated antiphase diffraction intensity oscillations, based on adatom coverages as a function of time, reveal a transition from a three-dimensional multilayer growth mode with EPt<20eV to a layer-by-layer growth with EPt≥20eV. We isolate the effects of irradiation-induced processes and thermally activated mass transport during deposition in order to identify the mechanisms responsible for promoting layer-by-layer growth. Direct evidence is provided to show that the observed transition in growth modes is primarily due to irradiation-induced processes which occur during the 10ps following the arrival of each hyperthermal atom. The kinetic pathways leading to the transition involve both enhanced intralayer and interlayer adatom transport, direct incorporation of energetic atoms into clusters, and cluster disruption leading to increased terrace supersaturation.
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- NATURAL SCIENCES
- NATURVETENSKAP
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