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@ARTICLE{Mller:57300,
author = {Müller, J. E. and Ibach, H.},
title = {{M}igration of point defects at charged {C}u, {A}g, and
{A}u (100) surfaces},
journal = {Physical review / B},
volume = {74},
number = {8},
issn = {1098-0121},
address = {College Park, Md.},
publisher = {APS},
reportid = {PreJuSER-57300},
pages = {085408},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {We report ab initio values for the electrical dipole moment
and for the formation and activation energies of adatoms and
vacancies migrating on Cu, Ag, and Au (100) surfaces, and we
discuss the effect of the electrical dipole energy of these
point defects on the rate of mass transport along charged
metal-electrolyte interfaces. We find that adatoms and
vacancies exhibit positive surface dipole moments, which for
positive electrode potentials tend to reduce the formation
and activation energies and increase the mobility of the
point defects. We also consider atom migration by an
exchange process involving the intermediate formation of
dimers, and find that the surface dipole moment of the Cu
and Ag dimers is negative, which means that they tend to
become more mobile for negative potentials. However, because
of their large activation energies, we conclude that the
exchange process is not likely to provide an energetically
favorable mechanism for migration in these systems. The Au
dimer has a small positive dipole moment, which implies that
the exchange process may contribute to surface transport but
only in neutral surfaces.},
keywords = {J (WoSType)},
cin = {ISG-3},
ddc = {530},
cid = {I:(DE-Juel1)VDB43},
pnm = {Grundlagen für zukünftige Informationstechnologien},
pid = {G:(DE-Juel1)FUEK412},
shelfmark = {Physics, Condensed Matter},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000240238900080},
doi = {10.1103/PhysRevB.74.085408},
url = {https://juser.fz-juelich.de/record/57300},
}