Journal ArticleDOI
Magnetic field induced Mott transition of a one-component electron plasma in GaAs quantum wells
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In this article, the authors measured the time-resolved magneto-photoluminescence of mixed type GaAs AlAs quantum wells, in which the electron density can be varied from ∼109 to ∼1011 cm−2.About:
This article is published in Solid State Communications.The article was published on 1997-11-01. It has received 23 citations till now. The article focuses on the topics: Mott transition & Trion.read more
Citations
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Journal ArticleDOI
Direct Observation of the Mott Transition in an Optically Excited Semiconductor Quantum Well
TL;DR: Evidence is given for the transition from an exciton-dominated population to an unbound electron-hole pair population as the pair density increases, thereby proving the coexistence of both species.
Journal ArticleDOI
Excitonic effects in the luminescence of quantum wells
Benoit Deveaud,L. Kappei,J. Berney,François Morier-Genoud,M. T. Portella‐Oberli,Jacek Szczytko,C. Piermarocchi +6 more
TL;DR: In this article, the origin of the excitonic luminescence in quantum wells was investigated by time-resolved photoluminescence experiments performed on a very high-quality InGaAs quantum well sample in which the photoluminance contributions at the energy of the trion and at the band edge can be clearly separated and traced over a broad range of times and densities.
Journal ArticleDOI
Ultrafast Dynamics of Exciton Formation in Semiconductor Nanowires
Chaw-Keong Yong,Hannah J. Joyce,James Lloyd-Hughes,Qiang Gao,Hark Hoe Tan,Chennupati Jagadish,Michael B. Johnston,Laura M. Herz +7 more
TL;DR: These results demonstrate that high-quality nanowires are model systems for investigating fundamental scientific effects in 1D heterostructures.
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Magneto-optics of two-dimensional electron gases modified by strong Coulomb interactions in ZnSe quantum wells
D. Keller,Dmitri R. Yakovlev,Dmitri R. Yakovlev,G. V. Astakhov,G. V. Astakhov,W. Ossau,Scott A. Crooker,Taras Slobodskyy,Andreas Waag,Georg Schmidt,Laurens W. Molenkamp +10 more
TL;DR: In this paper, a phenomenological description of the evolution of optical spectra for quantum wells with strong Coulomb interactions was provided, where the Coulomb interaction between electrons and photoexcited holes was investigated.
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Biexcitonic molecules survive excitons at the Mott transition
Mehran Shahmohammadi,Gwénolé Jacopin,Georg Rossbach,Jacques Levrat,Eric Feltin,Jean-François Carlin,Jean-Daniel Ganière,Raphaël Butté,Nicolas Grandjean,Benoit Deveaud +9 more
TL;DR: Against common beliefs, it is observed that the biexciton in a GaN quantum well is more stable towards the Mott transition than the exciton.
References
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Electronic processes in non-crystalline materials
TL;DR: The Fermi Glass and the Anderson Transition as discussed by the authorsermi glass and Anderson transition have been studied in the context of non-crystalline Semiconductors, such as tetrahedrally-bonded semiconductors.
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Observation of negatively charged excitons X- in semiconductor quantum wells.
Kuntheak Kheng,Kuntheak Kheng,R.T. Cox,R.T. Cox,Merle Y. d’ Aubigné,Merle Y. d’ Aubigné,Franck Bassani,Franck Bassani,K. Saminadayar,K. Saminadayar,Serge Tatarenko,Serge Tatarenko +11 more
TL;DR: The negatively charged exciton X is identified by its circular polarization properties in 1.7 K magentoabsorption spectra of CdTe by exploiting multiple quantum wells modulation doped with electron concentrations.
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Optical spectroscopy of a two-dimensional electron gas near the metal-insulator transition.
TL;DR: Optical measurements of a two-dimensional electron gas near the metal-insulator transition show that transition is induced by localization of single electrons in the electrostatic potential fluctuations of the remote ionized donors.
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Thermodynamics of free trions in mixed type GaAs/AlAs quantum wells
TL;DR: In this paper, an emission line which depends on the simultaneous presence of excitons and ∼1010 cm−2 photoexcited electrons in a 20nm quantum well is shown to be due to free negatively charged exciton (trions) and demonstrated that the trion is analogous to the negative positronium ion.