Journal ArticleDOI
Mott distortion of the electron-hole fluid phase diagram
TLDR
In this article, a broadening of the top of the phase diagram with gas densities at least a factor of 3 lower than expected in the region near the Mott density was observed.Abstract:
Spectroscopic measurements of the electron-hole fluid in Ge indicate that the liquid-gas phase diagram is distroted from that of simple fluids. This Mott distortion appears as a broadening of the top of the phase diagram with gas densities at least a factor of 3 lower than expected in the region near the Mott density. The precise shape of the phase boundary in the high-density gas remains uncertain because of inadequacies in our theoretical and experimental understanding of screening effects at finite temperatures. However, no first-order Mott transition separate from the liquid-gas transition is found to occur.read more
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Journal ArticleDOI
Mott transition, biexciton crossover, and spin ordering in the exciton gas in quantum wells
TL;DR: In this paper, the phase diagram of exciton gas in single and coupled quantum wells is presented, and it is shown that the strong direct repulsion between excitons prevents the biexciton formation.
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
Spin aligned exciton gas in uniaxially compressed Ge
TL;DR: In this article, it was shown that the statistical behavior of a spin aligned exciton gas up to high densities corresponding to rs≈2 at T ≥ 2K in strongly uniaxially compressed Ge in magnetic field is investigated.
Journal ArticleDOI
Charged clusters in strongly correlated electron gas
TL;DR: In this article, a mixture of electrons and holes in semiconductors is examined and it is shown that at intermediate ranges there are regions of over-screening, which at low densities become strong enough to destroy the homogeneous mixture by clustering charges.