Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'488'730
Articles rated: 2609

29 March 2024
 
  » arxiv » cond-mat/0606744

 Article overview


Origin of the 60 degree and 90 degree dislocations and their role in strain relief in lattice-mismatched heteroepitaxy of fcc materials
Atul Konkar ;
Date 28 Jun 2006
Subject Materials Science
AbstractStrain relief in lattice mismatched heteroepitaxy is mediated by formation and/or propagation of dislocations. Due to their technological significance, the process of strain relief in materials with face-centred cubic (fcc) lattices has been analyzed by several researchers1,2 following the work by Matthews and co-workers in the late 1960s to early 1970s3-6. In the Matthews model, it is assumed that the strain relieved by any misfit dislocation is equal to the edge component of the dislocation burgers vector in the interface plane. This assumption has been used in all subsequent analyses of strain relief in lattice mismatched heteroepitaxy [1,2]. Based upon the known three-dimensional atomic structure of the dislocations in fcc lattices, we show that the assumption is not valid for the 60 degree dislocations that form/expand via the conservative glide process. For compressively (tensilely) strained films the assumption is valid only for the 90 degree dislocations that form/expand via aggregation of vacancies (interstitials).
Source arXiv, cond-mat/0606744
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica