Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)

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Accueil > La Recherche > Axes & Equipes > Physique de l’Exciton, du Photon & du Spin > Optique des états collectifs et des spins (OECS) > Etats collectifs dans les semiconducteurs > Excitons indirects

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.

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 (...)

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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 (...)

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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 (...)

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More on indirect excitons

Read more on INDEX network website www.indexitn.eu

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