Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/101669
Type: Artigo
Title: Arsenic segregation, pairing and mobility on the cores of partial dislocations in silicon
Author: Antonelli, A.
Justo, J. F.
Fazzio, A.
Abstract: We studied the effects of arsenic on properties of dislocations in silicon. The theoretical investigation was carried out using ab initio total energy methods, based on the density functional theory. We find that the interaction of an arsenic impurity in the crystal with a dislocation results in a charge exchange, driving the dislocation core to a negative charge state. This interaction is essentially electrostatic and attractive, and leads to arsenic segregation. Although arsenic segregation to the core is energetically favourable, formation of arsenic pairs inside the core is energetically unfavourable. We also investigated the role of vacancies in arsenic diffusion inside the dislocation core.
We studied the effects of arsenic on properties of dislocations in silicon. The theoretical investigation was carried out using ab initio total energy methods, based on the density functional theory. We find that the interaction of an arsenic impurity in the crystal with a dislocation results in a charge exchange, driving the dislocation core to a negative charge state. This interaction is essentially electrostatic and attractive, and leads to arsenic segregation. Although arsenic segregation to the core is energetically favourable, formation of arsenic pairs inside the core is energetically unfavourable. We also investigated the role of vacancies in arsenic diffusion inside the dislocation core.
Subject: Silício
Cristais
Falhas de empilhamento
Arsênio
Country: Inglaterra
Editor: IOP Publishing
Citation: Journal Of Physics Condensed Matter. , v. 14, n. 48, p. 12761 - 12765, 2002.
Rights: fechado
Identifier DOI: 10.1088/0953-8984/14/48/314
Address: http://iopscience.iop.org/article/10.1088/0953-8984/14/48/314
Date Issue: 2002
Appears in Collections:IFGW - Artigos e Outros Documentos

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