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  Evolution of InAs quantum dot shape on GaAs(1¯1¯4¯)B

Xu, M. C., Temko, Y., Suzuki, T., & Jacobi, K. (2005). Evolution of InAs quantum dot shape on GaAs(1¯1¯4¯)B. Surface Science, 576(1-3), 89-97. doi:10.1016/j.susc.2004.12.012.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-097E-3 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-097F-1
Genre: Journal Article

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 Creators:
Xu, Ming Chun1, Author           
Temko, Yevgeniy1, Author           
Suzuki, Takayuki1, Author           
Jacobi, Karl1, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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Free keywords: scanning tunneling microscopy; quantum dot; growth; gallium arsenide; indium arsenide; SURFACE; TRANSITION; GROWTH; RECONSTRUCTIONS; PYRAMIDS; DOMES
 Abstract: InAs quantum dots (QDs) were grown by molecular beam epitaxy on GaAs(1 I 4)B surfaces and studied by in situ scanning tunneling microscopy (STM). Atomically resolved STM images, obtained for the QDs of different size, reveal that the QDs exhibit different shapes at different stages of evolution. First, small islands develop composed mainly of flat {135} and (112)B facets. Next, steeper {2511}A and {2511}A facets form at the {135}B and (112)B facets. Then a remarkable shape transition occurs with the aspect ratio increasing from 0.10 to 0.20. The QDs grow mainly in height now by stacking {2511}A layers so that new, steep {011} and (111)B facets appear at the side and the top {2511}A facets shrink and finally vanish. The mature QD is terminated by five steep facets besides the flat base. Further growth results in an elongation of the mature QD along the symmetry direction.

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Language(s): eng - English
 Dates: 2005-02-10
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 211200
URI: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVX-4F4WXP8-2&_user=28741&_handle=V-WA-A-W-BU-MsSAYWA-UUW-U-AAAWBBVDAY-AAUEEACCAY-ECVZZYAYA-BU-U&_fmt=summary&_coverDate=02%2F10%2F2005&_rdoc=15&_orig=browse&_srch=%23toc%235546%232005%23994239998%23562051!&_cdi=5546&view=c&_acct=C000003598&_version=1&_urlVersion=0&_userid=28741&md5=297054027acae50b8c56299e682cd7a0
DOI: 10.1016/j.susc.2004.12.012
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Title: Surface Science
  Alternative Title : Surf. Sci.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 576 (1-3) Sequence Number: - Start / End Page: 89 - 97 Identifier: -