The angular dislocation parallel to a free surface. Application to a (111)Si low angle twist boundary

• Published in: Philosophical Magazine
• Language: English
• Published: Taylor & Francis 2012
• Subjects: Physical Sciences; Roland; sami
• Online Access: http://hdl.handle.net/2262/64586; https://doi.org/10.1080/14786435.2011.600734

Abstract The elastic displacement field of a sharply angular dislocation with its two legs parallel to a planar free surface is given in a practical analytical form. Its expression gives access, in transmission electron microscopy (TEM), to computed images of numerous interacting dislocations all located at a distance h close to the free surface. As an application, this field is used repeatedly to study, in dark-field TEM and a g(3g) diffraction mode with g{220}, the contrast of dissociated triple nodes of a low-angle twist boundary in silicon extended over a (111) plane. It is shown that free surface elastic effects can influence the contrasts of some 30? partials if h is at nanometer scale. : User ID: 448406 merged with this user on 22-Sep-2004 by Davis, E A; User ID: 2918241 merged with this user on 02-Mar-2006 by Office, Editorial Bonnet, Roland, [e-mail] [Last in: 02-Oct-2008 05:21] merged with this user on 03-Oct-2008 by Office, Editorial; BONNET, Roland, [e-mail] [Last in: 01-Dec-2008 4:18 AM] merged with this user on 27-Dec-2010 by Zegarac, Dusica (Bonnet, R.) : User ID: 8607328 merged with this user on 18-May-2007 by Office, Editorial Youssef, Sami, [e-mail] merged with this user on 05-Jun-2008 by Office, Editorial (Youssef, Sami) : FOURNEL, Frank, [e-mail] merged with this user on 09-Dec-2008 by Merrifield, Natalie (fournel, frank) [e-mail] (Bonnet, R.) [e-mail] (NEILY, Salem) [e-mail] (Youssef, Sami) [e-mail] (fournel, frank) INP Grenoble, SIMAP (ex LTPCM) - Domaine Universitaire--> , BP 75--> - 38240 - saint martin d'heres - FRANCE (Bonnet, R.) 16, LE ROUTOIR--> , LES BEALIERES--> - 38240 - FRANCE (Bonnet, R.) Unite de recherche de Physique du Solide,, Faculte des Sciences de Monastir, - Monastir - TUNISIA (NEILY, Salem) Faculte des Sciences de Monastir, Unite de Recherche Physique des Solides - Monastir - TUNISIA (Youssef, Sami) CEA-DRT-LETI-CEA/GRE, Centre d'Etude Atomique - Grenoble - FRANCE (fournel, frank) FRANCE TUNISIA