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Memory effects and coverage dependence of surface diffusion in a model adsorption system

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Vattulainen, Ilpo
dc.contributor.author Ying, S. C.
dc.contributor.author Ala-Nissilä, Tapio
dc.contributor.author Merikoski, J.
dc.date.accessioned 2015-04-28T09:46:13Z
dc.date.available 2015-04-28T09:46:13Z
dc.date.issued 1999
dc.identifier.citation Vattulainen, I. & Ying, S. C. & Ala-Nissilä, Tapio & Merikoski, J. 1999. Memory effects and coverage dependence of surface diffusion in a model adsorption system. Physical Review B. Volume 59, Issue 11. P. 7697-7707. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.59.7697. en
dc.identifier.issn 1098-0121 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/15824
dc.description.abstract We study the coverage dependence of surface diffusion coefficients for a strongly interacting adsorption system O/W(110) via Monte Carlo simulations of a lattice-gas model. In particular, we consider the nature and emergence of memory effects as contained in the corresponding correlation factors in tracer and collective diffusion. We show that memory effects can be very pronounced deep inside the ordered phases and in regions close to first and second order phase transition boundaries. Particular attention is paid to the details of the time dependence of memory effects. The memory effect in tracer diffusion is found to decay following a power law after an initial transient period. This behavior persists until the hydrodynamic regime is reached, after which the memory effect decays exponentially. The time required to reach the hydrodynamical regime and the related exponential decay is strongly influenced by both the critical effects related to long-wavelength fluctuations and the local order in the overlayer. We also analyze the influence of the memory effects on the effective diffusion barriers extracted from the Arrhenius analysis. For tracer diffusion, we find that the contribution from memory effects can be as large as 50% to the total barrier. For collective diffusion, the role of memory effects is in general less pronounced. en
dc.format.extent 7697-7707
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society (APS) en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 59, Issue 11
dc.rights © 1999 American Physical Society (APS). http://www.aps.org en
dc.subject.other Physics en
dc.title Memory effects and coverage dependence of surface diffusion in a model adsorption system en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Physical Society (APS)
dc.contributor.school Perustieteiden korkeakoulu fi
dc.contributor.school School of Science en
dc.contributor.department Department of Applied Physics en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.subject.keyword surface diffusion coefficients en
dc.subject.keyword adsorption systems en
dc.subject.keyword Monte Carlo simulations en
dc.subject.keyword lattice-gas model en
dc.identifier.urn URN:NBN:fi:aalto-201504282485
dc.type.dcmitype text en
dc.identifier.doi 10.1103/physrevb.59.7697
dc.type.version Final published version en

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