Composition, volume, and aspect ratio dependence of the strain distribution, band lineups and electron effective masses in self-assembled pyramidal In1-xGaxAs/GaAs and SixGe1-x/Si quantum dots

Califano, M. and Harrison, P. (2002) Composition, volume, and aspect ratio dependence of the strain distribution, band lineups and electron effective masses in self-assembled pyramidal In1-xGaxAs/GaAs and SixGe1-x/Si quantum dots. Journal of Applied Physics, 91 (1). pp. 389-398. ISSN 1089-7550

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Abstract

We present a systematic investigation of the strain distribution of self-assembled pyramidal In1-xGaxAs/GaAs and SixGe1-x/Si quantum dots for the case of growth on a (001) substrate. The dependence of the biaxial and hydrostatic components of the strain on the quantum dot volume, aspect ratio, composition, and percentage of alloying x is studied using a method based on a Green's function technique. The dependence of the carriers' confining potentials and the electronic effective mass on the same parameters is then calculated in the framework of eight-band k .p theory. The results for which comparable published data are available are in good agreement with the theoretical values for strain profiles, confining potentials, and electronic effective mass. © 2002 American Institute of Physics.

Item Type:	Article
Copyright, Publisher and Additional Information:	Copyright © 2002 American Institute of Physics. Reproduced in accordance with the publisher's self-archiving policy. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Academic Units:	The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Microwaves and Photonics (Leeds)
Depositing User:	Repository Officer
Date Deposited:	02 Nov 2006
Last Modified:	08 Feb 2013 17:03
Published Version:	http://dx.doi.org/10.1063/1.1410318
Status:	Published
Publisher:	American Institute of Physics
Refereed:	Yes
Identification Number:	10.1063/1.1410318
URI:	http://eprints.whiterose.ac.uk/id/eprint/1683

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