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MBE growth and properties of bulk BeCdSe alloys and digital (BeSe : CdSe)/ZnSe quantum wells
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- Ivanov, S.V. (författare)
- Ioffe Institute of RAS, Politeknicheskaya 26, 194021, St. Petersburg, Russian Federation
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- Toropov, A.A. (författare)
- Ioffe Institute of RAS, Politeknicheskaya 26, 194021, St. Petersburg, Russian Federation
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- Shubina, T.V. (författare)
- Ioffe Institute of RAS, Politeknicheskaya 26, 194021, St. Petersburg, Russian Federation
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- Ioffe Institute of RAS, Politeknicheskaya 26, 194021, St Petersburg, Russian Federation Physikalisches Inst. Univ. Wurzburg, Am Hubland, D-97074, Würzburg, Germany (creator_code:org_t)
- 2000
- 2000
- Engelska.
- Ingår i: Journal of Crystal Growth. - 0022-0248 .- 1873-5002. ; 214, s. 109-114
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- 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.
Nyckelord
- TECHNOLOGY
- TEKNIKVETENSKAP
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- ref (ämneskategori)
- art (ämneskategori)
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- Journal of Crystal Growth (Sök värdpublikationen i LIBRIS)
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- Ivanov, S.V.
- Toropov, A.A.
- Shubina, T.V.
- Lebedev, A.V.
- Sorokin, S.V.
- Sitnikova, A.A.
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- Kop'Ev, P.S.
- Reuscher, G.
- Keim, M.
- Bensing, F.
- Waag, A.
- Landwehr, G.
- Pozina, Galia
- Bergman, Peder
- Monemar, Bo
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