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Cooperative effects in SiGe/Si quantum wells

✍ Scribed by V.V. Zaitsev; V.S. Bagaev; T.M. Burbaev; V.S. Krivobok; A.V. Novikov; E.E. Onishchenko

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
154 KB
Volume
40
Category
Article
ISSN
1386-9477

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✦ Synopsis

Studies of the luminescence spectra of Si 1Γ€x Ge x /Si quantum wells with a low Ge content have been carried out in a wide pumping power range. It was shown that a Si 1Γ€x Ge x /Si quantum well spectrum variation observed at low temperatures and high pumping powers is caused by cooperative effects-formation of the electron-hole liquid and multiexciton complexes in quantum wells.

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ESR Investigations of Modulation-Doped S
ESR Investigations of Modulation-Doped Si/SiGe Quantum Wells
✍ W. Jantsch; Z. Wilamowski; Z. Wilamowski; N. Sandersfeld; F. SchΓ€ffler πŸ“‚ Article πŸ“… 1998 πŸ› John Wiley and Sons 🌐 English βš– 152 KB

In standard electron spin resonance (ESR) spectroscopy on modulation-doped SiGe/Si/SiGe quantum wells, we observe a very sharp ESR due to the 2d electron gas and also cyclotron resonance (CR) of free carriers in the well. Both signals increase persistently after illumination and the 2d CR becomes sh