Analytical approach for strain and piezoelectric potential in conical self-assembled quantum dots

Autor:	Yia-Chung Chang, T. O. Cheche
Rok vydání:	2008
Předmět:	Condensed Matter::Materials Science Materials science Condensed matter physics Quantum dot Isotropy General Physics and Astronomy Dielectric Wetting Conical surface Elasticity (physics) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Piezoelectricity Wetting layer
Zdroj:	Journal of Applied Physics. 104:083524
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.2999639
Popis:	The problems of strain and piezoelectric effect are solved for a buried semiconductor quantum dot (QD) of conical shape with wetting layer, within continuum elastic model. Analytical results are obtained for the isotropic case of the elasticity. For the isotropic dielectric constant case, we provide an analytical expression of the piezoelectric potential. An extension of Eshelby’s [Proc. R. Soc. Lond. A 241, 376 (1957)] continuum elasticity theory of inclusions to QDs with wetting layers is adopted. The results for self-assembled InAs/GaAs QDs are compared with numerical results obtained with an atomistic model based on the valence force field method. We find good agreement between the results obtained with the two methods.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5bc7a2b7318b40f942245bc6eaac167d https://doi.org/10.1063/1.2999639 Zobrazit plný text záznamu