Laboratoire Charles Coulomb UMR 5221 CNRS/UM2 (L2C)

français


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.

Latest publications

Join us

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 (…)

Lire la suite

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, (…)

Lire la suite

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 (…)

Lire la suite

More on indirect excitons

Read more on INDEX network website www.indexitn.eu

Lire la suite


AIGLe

MathJax