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Excitons indirects
Indirect excitons in coupled quantum wells are long-living quasiparticles, explored in the studies of collective quantum states. At low density, decreasing the temperature of the exciton liquid leads to BEC. At higher densities and low temperatures a phase separation is predicted between Bose-Einstein and Bardeen-Cooper-Schrieffer -like condensates. The figure shows the phase diagram of an electron-hole system in temperature/density plane. Left and bottom scales stand for GaAs-based systems, right and upper scale for GaN and ZnO.
Latest publications
- Trapping Dipolar Exciton Fluids in GaN/(AlGa)N Nanostructures
F. Chiaruttini, T. Guillet, C. Brimont, B. Jouault, P. Lefebvre, S. Chenot, Y. Cordier, B. Damilano, M. Vladimirova
NanoLetters 19, 4911 (2019) arXiv:1902.02974 - PhD Thesis, François Chiaruttini, July 2020, available on Thèse-En-ligne
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- Master Internship/Funded PhD : Optical spectroscopy of quantum fluids of indirect excitons
Collaborations :
Transport of indirect excitons in wide-bandgap semiconductor quantum wells
Excitons in polar group-III nitride quantum wells (QWs) are naturally indirect, because electron and hole within such excitons are spatially separated. As a consequence, they have strong dipole (…)
Nonlinear optical spectroscopy of indirect excitons in coupled quantum wells
Indirect excitons in coupled quantum wells are long-living quasiparticles, explored in the studies of collective quantum states. We demonstrate that, despite the extremely low oscillator strength, (…)
Influence of magnetic quantum confined Stark effect on the spin lifetime of indirect excitons
We observed an unusual and counter-intuitive behaviour of spin lifetime of excitons in coupled semiconductor quantum wells (CQWs) in the presence of in-plane magnetic field. Instead of (…)
