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MBE growth and properties of bulk BeCdSe alloys and digital (BeSe: CdSe)/ZnSe quantum wells
Ioffe Institute of RAS, Politeknicheskaya 26, 194021, St. Petersburg, Russian Federation.
Ioffe Institute of RAS, Politeknicheskaya 26, 194021, St. Petersburg, Russian Federation.
Ioffe Institute of RAS, Politeknicheskaya 26, 194021, St. Petersburg, Russian Federation.
Ioffe Institute of RAS, Politeknicheskaya 26, 194021, St. Petersburg, Russian Federation.
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2000 (English)In: Journal of Crystal Growth, ISSN 0022-0248, E-ISSN 1873-5002, Vol. 214, 109-114 p.Article in journal (Refereed) Published
Abstract [en]

We report for the first time on MBE growth, structural and optical properties of single layers, quantum well structures and short-period superlattices based on BexCd1-xSe ternary alloys on GaAs. Both the conventional MBE growth mode and the sub-monolayer digital alloying technique (SDA) have been employed for the fabrication of the structures. Compositional boundaries of an instability region 0.03 < x < 0.38, calculated in a regular solution approximation for the completely coherent system, agree well with available experimental data. A suppression of the phase separation in BeCdSe by elastic stress in the layer, accompanied by a strong reduction of the Cd incorporation coefficient has been found. Ultrathin 2.8 ML BeCdSe SDA QWs with x approx. 0.15 demonstrate about an order of magnitude increase in the PL intensity with respect to the pure CdSe one, probably resulting from an enhanced carrier localization efficiency. Eg as a function of the Be content reveals a strong bowing in optical data, which allows one to consider BeCdSe alloys with compositions nearly lattice-matched to GaAs as potential materials for the active region of blue-green lasers.

Place, publisher, year, edition, pages
2000. Vol. 214, 109-114 p.
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Engineering and Technology
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URN: urn:nbn:se:liu:diva-47638DOI: 10.1016/S0022-0248(00)00041-5OAI: oai:DiVA.org:liu-47638DiVA: diva2:268534
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13

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Pozina, GaliaBergman, PederMonemar, Bo

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