Shape transition and dislocation nucleation in strained epitaxial islands
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Physics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000300025 |
Resumo: | We study numerically the equilibrium shape, shape transition and dislocation nucleation in strained epitaxial islands with a two-dimensional atomistic model, using interatomic potentials of Lennard-Jones type. The phase diagram for the equilibrium island shapes as a function of island size and lattice misfit with the substrate is obtained by an energy minimization procedure which does not require predefined faceted shapes. We determine the energy barrier and transition path for transition between different shapes of the islands and for dislocation nucleation in initially coherent islands using a method introduced recently, based on a systematic search of the transition paths for activated events. |
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Brazilian Journal of Physics |
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Shape transition and dislocation nucleation in strained epitaxial islandsStrained epitaxial islandsDislocation nucleationAtomistic modelWe study numerically the equilibrium shape, shape transition and dislocation nucleation in strained epitaxial islands with a two-dimensional atomistic model, using interatomic potentials of Lennard-Jones type. The phase diagram for the equilibrium island shapes as a function of island size and lattice misfit with the substrate is obtained by an energy minimization procedure which does not require predefined faceted shapes. We determine the energy barrier and transition path for transition between different shapes of the islands and for dislocation nucleation in initially coherent islands using a method introduced recently, based on a systematic search of the transition paths for activated events.Sociedade Brasileira de Física2006-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000300025Brazilian Journal of Physics v.36 n.2a 2006reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332006000300025info:eu-repo/semantics/openAccessJalkanen,J.Trushin,O.Granato,E.Ying,S.C.Ala-Nissila,T.eng2006-07-06T00:00:00Zoai:scielo:S0103-97332006000300025Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2006-07-06T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false |
dc.title.none.fl_str_mv |
Shape transition and dislocation nucleation in strained epitaxial islands |
title |
Shape transition and dislocation nucleation in strained epitaxial islands |
spellingShingle |
Shape transition and dislocation nucleation in strained epitaxial islands Jalkanen,J. Strained epitaxial islands Dislocation nucleation Atomistic model |
title_short |
Shape transition and dislocation nucleation in strained epitaxial islands |
title_full |
Shape transition and dislocation nucleation in strained epitaxial islands |
title_fullStr |
Shape transition and dislocation nucleation in strained epitaxial islands |
title_full_unstemmed |
Shape transition and dislocation nucleation in strained epitaxial islands |
title_sort |
Shape transition and dislocation nucleation in strained epitaxial islands |
author |
Jalkanen,J. |
author_facet |
Jalkanen,J. Trushin,O. Granato,E. Ying,S.C. Ala-Nissila,T. |
author_role |
author |
author2 |
Trushin,O. Granato,E. Ying,S.C. Ala-Nissila,T. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Jalkanen,J. Trushin,O. Granato,E. Ying,S.C. Ala-Nissila,T. |
dc.subject.por.fl_str_mv |
Strained epitaxial islands Dislocation nucleation Atomistic model |
topic |
Strained epitaxial islands Dislocation nucleation Atomistic model |
description |
We study numerically the equilibrium shape, shape transition and dislocation nucleation in strained epitaxial islands with a two-dimensional atomistic model, using interatomic potentials of Lennard-Jones type. The phase diagram for the equilibrium island shapes as a function of island size and lattice misfit with the substrate is obtained by an energy minimization procedure which does not require predefined faceted shapes. We determine the energy barrier and transition path for transition between different shapes of the islands and for dislocation nucleation in initially coherent islands using a method introduced recently, based on a systematic search of the transition paths for activated events. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000300025 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000300025 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-97332006000300025 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
Brazilian Journal of Physics v.36 n.2a 2006 reponame:Brazilian Journal of Physics instname:Sociedade Brasileira de Física (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Física (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Brazilian Journal of Physics |
collection |
Brazilian Journal of Physics |
repository.name.fl_str_mv |
Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF) |
repository.mail.fl_str_mv |
sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br |
_version_ |
1754734862699331584 |