Quasi-condensation of bilayer excitons in a periodic potential
Quasi-condensation des excitons dans un potentiel périodique
Résumé
We study two-dimensional excitons confined in a lattice potential, for high fillings of the lattice sites. We show that a quasi-condensate is possibly formed for small values of the lattice depth, but for larger ones the critical phase-space density for quasi-condensation rapidly exceeds our experimental reach, due to the increase of the excitons effective mass. On the other hand, in the regime of a deep lattice potential where excitons are strongly localised at the lattice sites, we show that an array of phase-independent quasi-condensates, different from a Mott insulating phase, is realised.
Domaines
Matière Condensée [cond-mat]| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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