Low-energy ion irradiation during film growth: Kinetic pathways leading to enhanced adatom migration rates
2005 (English)In: Applied Physics Letters, ISSN 0003-6951, Vol. 86, 211915- p.Article in journal (Refereed) Published
Embedded-atom molecular dynamics simulations are used to investigate the effects of low-energy self-ion irradiation of Pt adatoms on Pt(111). Here, we concentrate on self-bombardment dynamics, i.e., isolating and monitoring the atomic processes, induced by normally incident Pt atoms with energies E ranging from 5 to 50 eV, that can affect intra- and interlayer mass transport.. We find that adatom scattering, surface channeling, and dimer formation occur at all energies. Atomic intermixing events involving incident and terrace atoms are observed at energies 15 eV, while the collateral formation of residual surface vacancies is observed only with E>40 eV. The overall effect of low-energy self-ion irradiation is to enhance lateral adatom and terrace atom migration. ©2005 American Institute of Physics
Place, publisher, year, edition, pages
2005. Vol. 86, 211915- p.
platinum, adsorbed layers, ion beam effects, molecular dynamics method, channelling, vacancies (crystal), diffusion, metallic thin films, surface structure
IdentifiersURN: urn:nbn:se:liu:diva-13934DOI: 10.1063/1.1940122OAI: oai:DiVA.org:liu-13934DiVA: diva2:22227