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Title: New mechanism for dislocation blocking in strained layer epitaxial growth

Abstract

Dislocation interactions play a critical role in plasticity and heteroepitaxial strain relaxation. We use real time transmission electron microscopy observations of the interaction between threading and misfit dislocations in SiGe heterostructures to investigate interactions quantitatively. In addition to the expected long range blocking of threading segments, we observe a new short range mechanism which is significantly more effective. Simulations show that this reactive blocking occurs when two dislocations with the same Burgers vector reconnect.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Director, Office of Science. Office of Basic Energy Studies. Division of Materials Sciences (US)
OSTI Identifier:
791779
Report Number(s):
LBNL-46315
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: 503601; TRN: US200204%%97
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 84; Journal Issue: 5; Other Information: Journal Publication Date: January 31, 2000; PBD: 14 Sep 1999; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BURGERS VECTOR; DISLOCATIONS; PLASTICITY; STRESS RELAXATION; STRAINS; GERMANIUM SILICIDES; MITIGATION; DISLOCATIONS HETEROEPITAXY IN-SITU TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Stach, E.A., Schwarz, K.W., Hull, R., Ross, F.M., and Tromp, R.M. New mechanism for dislocation blocking in strained layer epitaxial growth. United States: N. p., 1999. Web.
Stach, E.A., Schwarz, K.W., Hull, R., Ross, F.M., & Tromp, R.M. New mechanism for dislocation blocking in strained layer epitaxial growth. United States.
Stach, E.A., Schwarz, K.W., Hull, R., Ross, F.M., and Tromp, R.M. Tue . "New mechanism for dislocation blocking in strained layer epitaxial growth". United States. https://www.osti.gov/servlets/purl/791779.
@article{osti_791779,
title = {New mechanism for dislocation blocking in strained layer epitaxial growth},
author = {Stach, E.A. and Schwarz, K.W. and Hull, R. and Ross, F.M. and Tromp, R.M.},
abstractNote = {Dislocation interactions play a critical role in plasticity and heteroepitaxial strain relaxation. We use real time transmission electron microscopy observations of the interaction between threading and misfit dislocations in SiGe heterostructures to investigate interactions quantitatively. In addition to the expected long range blocking of threading segments, we observe a new short range mechanism which is significantly more effective. Simulations show that this reactive blocking occurs when two dislocations with the same Burgers vector reconnect.},
doi = {},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 5,
volume = 84,
place = {United States},
year = {1999},
month = {9}
}